Thursday, September 5, 2019
Effectiveness of Fracking Regulations
Effectiveness of Fracking Regulations    Overview  of Report   This report has been prepared by The MSSD for the Secretary of State for Communities and Local Governments. This report will be looking at the effectiveness of the regulatory framework of the fracking industry, it will assess the current framework, evaluating whether the framework is fit for purpose, and if not, propose alternatives considering that a lighter touch to regulation is the approach wanting to be taken. Because we are only at the exploratory phase of drilling in the UK, the main focus will be on pre-drilling regulations.  What  is Fracking?  We  will briefly look at what Fracking is and how it works, and looking at this  will also allow us to be able to assess the most pressing environmental  concerns and the controversies surrounding fracking.     Fracking is the process of drilling down into the earth before a high-pressure water mixture is directed at the rock to release the gas inside.à  Water, sand and chemicals are injected into the rock at high pressure which allows the gas to flow out to the head of the well.à  The process can be carried out vertically or, more commonly, by drilling horizontally to the rock layer and can create new pathways to release gas or can be used to extend existing channels. The term fracking refers to how the rock is fractured apart by the high-pressure mixture.[1] In the UK, drilling is only at an exploratory phase, however, there are plans for this to intensify as shale gas reserves have been identified across the UK.   Impacts and Concerns   Having looked at what Fracking is, we will  identify itââ¬â¢s impacts on the environment and its most pressing concerns.   The  extraction of shale gas is a topic that is highly controversial in the United  Kingdom, this is mainly because of the environmental concerns it raises. One of  the major concerns is the water usage in the extraction, the volume of water  that is needed. Vast amounts of water are required for the process and this  must be transported to the fracking sites[2].  The water tends to be transported to the sites, which has its own environmental  impacts, though some sites could use the local water resources and the volume  of water that is required could place a strain on local water resources. In  addition to the amounts of water, the water is mixed with chemicals, this  mixture could escape and could spill or contaminate groundwater in the  surrounding areas.   Another  concern is that fracking could lead to small earthquakes. This was the case in  the town of Blackpool, where two tremors struck, one registered a magnitude 2.3  and the other 1.3. Both tremors occurred near the local drilling site. This  caused the operation to suspended, the site operators, Cuadrilla, commissioned  a report, which found that ââ¬Å"Most likely, the repeated seismicity was induced by  direct injection of fluid into the fault zoneâ⬠[3]  The report goes on to question whether further earthquakes are to be expected  from fracking, it says ââ¬Å"the earthquakes occurred  because of a rare combination of circumstances: the fault was already under  stress, was brittle enough to fracture and had space for large amounts of water  that could lubricate itâ⬠. The report says ââ¬Å"this is unlikely to happen again at  the Preese Hall site.â⬠[4]  To reduce the risk of earthquakes, it has been proposed that seismic activity  monitoring is introduced around fracking sites.   Advantages and Disadvantages  of Fracking   The main  advantages of fracking include, an increase in the production of natural gas,  some could argue that this would ease the burden on finite resources such as  fossil fuels, fracking would thus diversify our energy supplies. A further  advantage is that this is a relatively clean energy source, providing  environmental benefit. The gas produced emits less carbon per calorie of energy  produced than other fossil fuels. It is easy to inject and it can be  transported directly, shale gas requires very little infrastructure investment  before it can be injected into the national gas grid, thus proving to be an  economical benefit. Fracking is also the most natural way to pump gas from the  ground. An abundant supply of natural gas makes prices relatively cheap to  producers and consumers.   The disadvantages of fracking include, Risk of groundwater  pollution, Risk of localised earthquakes (probably not a huge risk when  well-regulated in the UK), Localised noise and traffic congestion, Loss of  amenities, when fracking wells are sited in areas of natural beauty and  national parks, A high water demand for the ââ¬Å"process waterâ⬠ needed by the  fracking technology used, potentially entailing additional stress on water  supplies, Planning blight on local properties, and suffering by those  unfortunate enough to live near a proposed site for a fracking well. [5]  Environmental  Policy Context   Fracking also poses wider questions about current  thinking on sustainability and the environment. [6]  John Allen writes, ââ¬Å"the shale revolution has the potential to provide the UK  with local, low cost, clean sources of energy and potential for local energy independenceâ⬠  [7]  from a sustainable development viewpoint, this makes for positive reading. If  fracking is low cost and a cleaner source of energy, it enables sustainable development.  However, looking at the intricacies of fracking, this may not seem the case.  For the process to take place, a vast number of resources are needed, and here  you look at whether fracking, as an industry, is sustainable. The shale gas  industry consumes materials such as water, sand, chemical treatments, drilling  fluids, all of which require transport by road and rail. Perhaps one of the  biggest challenges is the use of water, the volume required is vast, and to  sustain that, there must be an infrastructure in place and policies in place to  ensure that whilst providing the water to sites, there is no inconvenience to  the water flow in the local area and if being transported via tank to the site,  this must be done in a way where the environment is put first.   If we are looking at this from the standpoint  ââ¬Å"what is best for the environmentâ⬠, surely the question would be, why does the  policy not encourage the use of no oil and gas in the UK, because this would be  the best policy for the environment. The answer to this would be several  factors, mainly economical and convenience, the ecosystems we live with and in  are so adept to using those resources, that to prohibiting use would mean that  our systems would fail to exist. A middle ground has been established, whereby  the environment is somewhat protected and that human needs are met, and this  needs to be the case with fracking, whilst there are signs that there are  benefits, economically the policy must promote sustainable development.   ââ¬Å"History shows us that whenever we can extract fossil fuels, short term gain, usually trumps long- term consequence. Much has been made, on both sides of the argument, of the US experience, but fracking has not found universal welcome. France, for instance, is in the process of banning it, and Poland is currently deciding whether to develop the industry, or concentrate on other forms of energy.â⬠  [8]  John Allen    If there is regulation and procedures in place to negate the downsides,  surely a cleaner alternative is beneficial long term.à   à    Regulation  of Fracking   Now we  will be looking at the regulatory framework that is in place for the industry.  This section will be split into three parts: 1) An overview of the regulatory  framework, 2) Assess and analyse the strengths and weaknesses of the  frameworks, 3) Consider whether any improvements can be made to the framework,  looking at different types of regulation. à    Overview  of Regulation   The Environment Agency (EA) in England and Wales, and Scottish  Environment Protection Agency (SEPA) are the environmental regulators who  monitor the environmental aspects of shale gas fracking. The key regulation  that governs how shale gas fracking operators comply with environmental laws is  the Environmental Permitting Regulations 2010.[9]  Figure 2: https://www.gov.uk/government/publications/about-shale-gas-and-hydraulic-fracturing-fracking/developing-shale-oil-and-gas-in-the-uk#regulation   The  framework that surrounds fracking is one that is quite complex. Companies  wanting to explore must have permission from a number of regulatory bodies  before they can proceed. In order to explore and produce shale gas, operators  must pass rigorous health and safety, environmental and planning permission  processes.[10]  The first stage is obtaining a Petroleum Exploration and Development License,  (PEDL), these are issued by the Oil and Gas Authority. The Oil and Gas  Authority work closely with other regulatory partners to ensure that the  exploration and development is safe and sustainable. [11]  A PEDL obligates companies to follow its terms. Key PEDL terms include:  conferral  of the right to get petroleum, payment of fees in return, parameters of the  field licensed to the operator, obligation to obtain written consent prior to  drilling, operatorââ¬â¢s obligation to work the licensed area in accordance with  ââ¬Ëgood oilfield practiceââ¬â¢ and termination and surrender provisions. PEDLS are licenses  which grant exclusivity to operators in the license area, they do not give  immediate consent for drilling an exploration well or any other operation.   Briefing paper  After a PEDL has been granted, the operator of the proposed  site must then obtain local planning permission from the Minerals Planning  Authority, as shale gas operations involve the extraction of minerals. The MPA  involves local authorities including representatives from districts and county  councils.[12] à  Planning applications require the submission  of a standard application form, supported by plans and drawings, certificates  of ownership relating to the application site and design and access statements.  An operator must also negotiate access with landowners. A PEDL and planning  permission alone do not give operators consent to conduct their  operations, access must be secured by the operator, this tends to be through a  license or a lease to be taken that are conditional on the grant of  satisfactory planning consent. When a decision is made on a planning  application, only planning matters called ââ¬Å"material considerationsâ⬠ can be  taken into account. There is no exhaustive list of what constitutes a material  planning consideration, although there are some ââ¬Å"principal issuesâ⬠ for consideration,  shown in Figure 3 [13]  MPAââ¬â¢s are screened to determine whether any proposals  require an Environmental Impact Assessment (EIA), the Environment Protection Agency an EIA describe this  as ââ¬Å"the process by which the anticipated  effects on the environment of a proposed development or project are  measured.à  If the likely effects are unacceptable, design measures or other  relevant mitigation measures can be taken to reduce or avoid those effects.â⬠[14]  This, however, is a contentious issue, as itââ¬â¢s not clear whether operators are  obliged to conduct and EIA and submit an environmental statement under the EUââ¬â¢s  EIA Directive[15]  to accompany their application. Under the EU law, all projects require an  environmental statement, though those under Annex 2 require a case-by-case  examination, and considering certain criteria, it is determined that such a  project is likely to have significant effects on the environment. Even if an  EIA is not required, environmental and health impacts can be addresses through  the conditions of planning permission. Mineral Planning Authorities are  responsible for ensuring operators comply with these conditions.   The MPA, in determining an application, will consider the  advice of a variety of statutory consultees with regards to the protection of  the environment and the public. Local planning conditions can address the  aesthetic impacts, as well as contributions to local noise, traffic and air  pollution. The density of local population may be considered in the local  planning permission process. There will also be conditions for when operations  finish, the operator would be responsible for safe abandonment of the well and  for restoring the well-site to its previous state or a suitable condition for  re-use. The authority which granted permission would require suitable  restoration as a condition of the planning permission. [16]  The next part of the regulatory process is that operators  will probably require a number of environmental permits issued by the  Environment Agency under the Environmental Permitting (England and Wales)  Regulations to conduct onshore activities. à  The environment agency takes a risk-based  approach to regulating, thus the regulation of each site is bespoke to that  site, as the they take into account local site characteristics and site  specific environmental risks. à  The Environment Agencyà  ensures  that any shale gas operations are conducted in a way that protects people and  the environment. The Environment Agencyââ¬â¢s environmental permitting regulations  cover: protecting  water resources, including groundwater (aquifers) as well as assessing and  approving the use of chemicals which form part of the hydraulic fracturing  fluid, appropriate treatment and disposal of mining waste produced during the  borehole drilling and hydraulic fracturing process, suitable treatment and  management of any naturally occurring radioactive materials (NORM) and disposal  of waste gases through flaring.[17] à  With regards to water, if operators are  wishing to abstract more than 20 cubic meters per day for operational purposes,  they will need to obtain a water abstraction license under section 24/24A of  the Water Resources Act 1991[18]  The licenses are issues by the Environment Agency. A factor to bear in mind  here is the Environment Agency make it clear that water availability at site is  not ââ¬Å"guaranteedâ⬠, this links back to the planning permission stage, as if the  operators are unable to have a pipeline, they will have to transport the water  to the site, which is expensive, but also, with regards to the environment,  transporting tanks of water would be something they would have to consider.   Another element to be considered is the element of  ââ¬Å"induced seismicityâ⬠. The MPAs should consult the British Geological Survey  (BGS) to advise on induced seismicity and help to identify suitable locations  for well, drawing on a national and site-specific understanding of geology. [19]  Under s.23 of the Mining Industry Act 1926[20]  ââ¬Å"firm sinking boreholes greater than 100ft (30m) deep must give written  notification to the Natural Environmental Research Council. Operators are under  several other continuing obligations, such as keeping records of their  operations and retain specimen cores.   Once  the above has been completed, the operator must notify the Health and Safety Executive  at least of 21 days in advance of any drilling operations, The Borehile and  Operations Regulations 1995[21]  require this. A coordinated regulatory effort is required to ensure that shale  gas wells are designed, constructed and operated to standards that protect both  people and the environment, it must be noted that it only protects those in  proximity of sites. HSE monitors shale gas operations  from a well integrity and site safety perspective. We oversee that safe working  practices are adopted by onshore operators as required under the Health and  Safety at Work Etc. Act 1974, and regulations made under the Act. These  specifically are: The Borehole Site and Operations Regulations 1995 (BSOR) applies  to shale gas operations.à   (These regulations are primarily  concerned with the health and safety management of the site). The Offshore Installations and Wells  (Design and Construction, etc.) Regulations 1996 (DCR)[22] apply to all wells  drilled with a view to the extraction of petroleum regardless of whether they  are onshore or offshore. (These regulations are primarily  concerned with well integrity). HSE works closely with the Environment Agency  (EA) and the Department of Energy and Climate Change (DECC) to share relevant  information on such activities and to ensure that there are no material gaps  between the safety, environmental protection and planning authorisation  considerations, and that all material concerns are addressed. [23]  Drilling operations must not be commenced unless a health and safety policy is  prepared which demonstrates that adequate measure will be taken to safeguard  the health and safety of the persons on the site.   Once  the HSE step is completed, we arrive at one of the final steps in the regulatory  process. This is the Oil and Gas Authorities consent to drill. Operators are  obliged to seek the OGAs written consent prior to the start of drilling  operations. OGA consent is one of the final, and coordinating consents in the  shale gas process. In considering whether to issue consent to drill, the OGA  will have regard to the suite of regulatory controls discussed above, including  ensuring that planning permission is in place, environmental permits and consents  have been obtained, and that the HSE has received notice of intention to drill.  Planning  permission is one of the approvals required before any activity may start on a  site. The planning authority decides whether the activity is acceptable at that  particular location, after local communities and other interested people have  had the opportunity to set out their view on the benefits and impacts of the  proposal. On receipt of OGAââ¬â¢s consent to drill, and  subject to the finalisation of a hydraulic fracturing plan and agreed method  for monitoring induced seismicity (where fracking is going to be conducted), an  operator has in place the requisite consents and may continue its operations.  This concludes the pre-drilling  regulatory framework, there is a duty in place whilst drilling takes place, and  as mentioned, conditions are set out for after the drilling process has been  completed.   Strengths and Weaknesses   One of the main strengths with the  framework presented above, in my opinion, is that the process to start drilling  is so rigorous. There are many steps an operator must take in order to start  drilling, this has a lot of cost and time investment necessary, so these  rigorous checks and procedures ensure that the operator is competent and  ensuring the environmental protection necessary to offset any negative impacts  of fracking in the main.   Another strength with the framework is  the fact that a condition of granting permission to drill, there must be plans  in place on how the site will be restored to ensure that it becomes usable land  again, showing that the regulation is offering a protection measure.   However, it could be argued that there  are more weaknesses with the regulation.   One of the major  ones that comes across with the regulation framework provided above, is one  concerning Environmental Impact Assessments (EIA). An operator may have to  carry out an EIA, if the MPA deem necessary when screening the proposal  presented, however, there is no obligation to do so, it only has to happen  should the MPA feel it is a necessity in this case. à  There isnââ¬â¢t a ââ¬Å"one size all fitsâ⬠ approach  here, itââ¬â¢s bespoke. Environmental Risk Assessment (ERA) has  become best practice in non-shale gas industries[24],  however like the EIA, an ERA is not mandatory, an ERA, unlike an EIA would  assess not only the impacts of hazards, but also their likelihood. In their  report, the Royal Society recommended[25], that  to manage environmental risks, an Environmental Risk Assessment should be  mandatory for all shale gas operations, involving the participation of local  communities at the earliest possible opportunity. I would agree with this  statement, an EIA and ERA should be a mandatory step, for all potential  operators and cases of fracking, not just some, it should be a universal  requirement when applying to drill for shale gas.   In her Article, Emily Gosden writes  that the Fracking Regulations may inadequate, with regards to climate change[26]. From  the regulation mentioned above, it does not tackle issues such as climate  change in much depth, whilst it looks at environmental factors, it seems that  this isnââ¬â¢t the most pressing matter on the agenda. The article reports that  Britainââ¬â¢s fracking regulations may be inadequate to prevent environmentally  damaging methane leaks, and that the current regulatory regime fell short of  the minimum necessary standards. [27] Prof Jim  Skea, one of the reportââ¬â¢s authors, said that the law instead gave ââ¬Å"quite a lot  of discretionâ⬠ to the Environment Agency (EA) over what monitoring it would  require of future shale gas production. Here, I would agree, the EA can often  be quite vague when it comes to these matters, an example mentioned above would  be the water abstraction licenses requirement, the EA are very vague when it  comes to a definitive answer. This could be something that could be further considered.    Another weakness in my opinion is that the  current framework at present, isnââ¬â¢t very environment focused, and even if it  is, a lot of the environmental factors arenââ¬â¢t factors that are mandatory for  operators or regulators to take into account, as already mentioned, the EIA not  being mandatory is one part. The regulation does not look at in enough detail  issues such as climate change, air pollution, water pollution, and other means  of contamination, these factors should be of more importance when coming to  regulate the shale gas industry, yes, they may be considered, but even that at  best is brief.   Alternate Proposals   The current framework that has been looked at in  this report can be seen to be rigorous in the main, there are a number of steps  an operator must take before being able to start the process. The current  framework could be seen as being on the ââ¬Å"heavier sideâ⬠ of regulation, and in  the brief, a theory was posited that there be a lighter touch on regulation, in  this section, we will look at whether this can be the case, and if so, how can  it be the case. à    With regards to regulation, there are two  approaches that can be taken. There is Direct Regulation, which can often be  referred to as ââ¬Å"the command and controlâ⬠ regime, this is where standards are  set, as are penalties for failing to meet them, there are often several ways of  drafting direct regulation. [28] The  other approach is Indirect Regulation. Whereas direct regulations focus on the  polluting activity itself, indirect regulation tends to centre on economic  instruments, the effect of which will be to impose higher burdens on higher  polluters, there is also self-regulating, whereby you can apply methods such as  voluntary environmental agreements and codes of conducts to regulate. These  systems tend to have vague standards and are flexible and non-interventionist  in their nature.  We will look at whether we stay with a  command and control approach adopted, or would a self-regulating approach be  more effective in this situation. Before we start that, we will briefly look at  whether the current framework we have looked at is effective in its purpose,  however looking at the effectiveness of the framework is an area where one  struggles as in the UK, we are not at the stages where there is mass production  of shale gas, we are merely at the early exploratory stages of the process. The  only real working example is the Cuadrilla site as mentioned at the start of  this report. Though some regulation, such as the induced seismicity was  introduced because of that site.   Self-regulating such an industry seems  impractical considering the disadvantages mentioned earlier in the report. Simon  Sneddon writes that this method of regulation is more flexible than the  traditional command and control methods, and this method is non-interventionist  in nature and that these methods are criticised for having vague standards and  for being unaccountable, and there is no realistic enforcement system. This, as  a regulation method would not work with an industry such as fracking. An  industry where there are many impacts both environmental and economic and as  such a framework of command and control would be better suited, there is a set  of rules, or steps put in place and there are penalties and fines for operators  should they fail to abide. This is very similar to the current framework in  place. The risks that fracking entails, it would be a uncertain approach to  have a light touch to regulation. However, when there is more data to analyse  once further fracking takes place, it may be the case that we could adopt a self-regulating  framework or one that is lighter than the one in place, but until then, the  current ââ¬Å"command and controlâ⬠ framework is one that is effective and sufficient  for use.   Conclusion   The regulation in place at present is several  steps that an operator must take before they are able to drill for shale gas.  The procedure is one that is described as rigorous and upon evaluation this  seems to be the case, though as mentioned when looking at alternatives, there  is no way of knowing how effective the regulation is in the UK, until there are  more working examples of fracking.   [i]    [1] Bbccouk,à  What is fracking and why is it  controversial? à  (BBC News,à  16 December 2015)à  Ã  accessed 10 May 2017  [2] Bgs,à  Potential environmental considerations  associated with shale gasà  (Bgsacuk,à  0)à  accessed  10 May 2017  [3] Michael Marshall,à  How  fracking caused earthquakes in the UKà  (New  Scientist,à  2 November 2011)à  Ã  accessed 10 May 2017  [4] Ibid 3  [5] Steve Last,à  The  pros and cons of fracking in the UK and why you need to know about themà  (Lowimpactorg,à  14  October 2016)à  Ã  accessed  10 May 2017  [6] DrGareth Evans,à  Fracking:  Truly Sustainable?à  (Sustainablebuildcouk,à  16  Dec 2016)à  Ã  accessed  10 May 2017  [7] Allen John,à  Fracking:  believe the hype for a sustainable UK energy marketà  (The  Guardian,à  22 January 2014 )à  Ã  accessed  10 May 2017  [8]  Ibid 6  [9] Hsegovuk,à  The regulation of onshore unconventional  oil and gas exploration (shale gas)à  (Hsegovuk,à  0)à  accessed  10 May 2017  [10] Govuk,à  Guidance on Fracking: Developing shale  gas in the UKà  (Wwwgovuk,à  13 January 2017)à  Ã  accessed 10 May 2017  [11] Govuk,à  Guidance on Fracking: Developing shale  gas in the UKà  (Wwwgovuk,à  13 January 2017)à  Ã  accessed 10 May 2017  [12] Society,  T. (2012).à  Shale gas  extraction in the UK: A review of hydraulic fracturing.  [13] Briefing Paper Number 6073 on Shale Gas and Fracking ââ¬â  House of Commons Library   [14] Wwwepaie,à  Environmental  Impact Assessment à  (Wwwepaie,à  0)à  Ã  accessed 10 May 2017  [15] Directive 2011/92/EU  [16] Department of Energy and Climate Change ââ¬â Fracking UK Shale:  Regulation and Monitoring ââ¬â February 2014  [17] Govuk,à  Guidance on  Fracking: Developing shale gas in the UKà  (Wwwgovuk,à  13 January 2017)à  Ã  accessed 10 May 2017  [18] Water Resources Act 1991  [19] Ibid 7   [20] Mining Industry Act 1926  [21] Borehile and Operations Regulations 1995  [22] The Offshore Installations and Wells (Design and  Constructions, etc.) Regulations 1996  [23] Hsegovuk,à  The  regulation of onshore unconventional oil and gas exploration (shale gas)à  (Hsegovuk,à  0)à  accessed  10 May 2017  [24] Contribution from Professor Simon  Pollard, Head of Department, Environmental Science and Technology, Cranfield  University   [25] Society, T. (2012).à  Shale gas extraction in the UK: A  review of hydraulic fracturing.  [26] E Gosden, ââ¬ËFracking regulations inadequateââ¬â¢ The Telegraph (7 July 2016)   accessed 10 May 2017  [27] ibid 20  [28] Simon Sneddon,à  Environmental Lawà  (2ND edn,à  Pearsonà  2015)à  54-61    [i] Bibliography   Websites    http://www.bbc.co.uk/news/uk-14432401  http://www.bgs.ac.uk/research/energy/shaleGas/environmentalImpacts.html  https://www.newscientist.com/article/dn21120-how-fracking-caused-earthquakes-in-the-uk/  http://www.hse.gov.uk/offshore/unconventional-gas.htm  https://www.gov.uk/government/publications/about-shale-gas-and-hydraulic-fracturing-fracking/developing-shale-oil-and-gas-in-the-uk#regulation  https://www.gov.uk/government/publications/about-shale-gas-and-hydraulic-fracturing-fracking/developing-shale-oil-and-gas-in-the-uk#regulation  http://www.epa.ie/monitoringassessment/assessment/eia/  http://www.hse.gov.uk/offshore/unconventional-gas.htm  Steve  Last,à  The  pros and cons of fracking in the UK and why you need to know about themà  (Lowimpactorg,à  14  October 2016)à  Ã  accessed  10 May 2017  DrGareth  Evans,à  Fracking:  Truly Sustainable?à  (Sustainablebuildcouk,à  16  Dec 2016)à  Ã  accessed  10 May 2017  Allen  John,à  Fracking:  believe the hype for a sustainable UK energy marketà  (The  Guardian,à  22 January 2014 )à  Ã  accessed  10 May 2017  Directives    Directive  2011/92/EU  Reports    Society, T. (2012).à  Shale gas extraction in the UK: A  review of hydraulic fracturing.  Contribution from Professor Simon Pollard, Head of Department,  Environmental Science and Technology, Cranfield University  E  Gosden, ââ¬ËFracking regulations inadequateââ¬â¢ The  Telegraph (7 July 2016)   accessed 10 May 2017  Department  of Energy and Climate Change ââ¬â Fracking UK Shale: Regulation and Monitoring ââ¬â  February 2014  Briefing  Paper Number 6073 on Shale Gas and Fracking ââ¬â House of Commons Library   Acts  Water  Resources Act 1991  Mining  Industry Act 1926  Borehile  and Operations Regulations 1995  The  Offshore Installations and Wells (Design and Constructions, etc.) Regulations  1996  Books  Simon Sneddon,à  Environmental Lawà  (2ND edn,à  Pearsonà  2015)à  54-61  Misc.  PowerPoints  and Notes from Lectures.     
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