Global climate change mitigation action is hampered by systematic under-assessment of national ‘fair shares’, largely on the basis of perceived national interests. This paper aims to inform discussions centred on South Africa’s nationally determined contribution (NDC) by estimating (1) emissions reduction pathways for the country using the Climate Equity Reference Calculator (CERC) assuming a maximum 2°C aggregate warming target and (2) the likely economy-wide net mitigation costs or savings associated with reaching these pathways if known lower-cost mitigation measures, identified through the national mitigation potential analysis, are prioritised. The cumulative net savings associated with achieving the CERC ‘fair share’ emissions pathway, assuming the moderate use of low carbon power generation measures, would reach $5.3 billion by 2030. Net savings could be substantially greater reaching $46.8 billion by 2030 assuming power generation focuses on moving towards full decarbonisation. An unconditional commitment to the mitigation action implied by the ‘fair share’ emissions pathway therefore seems reasonable and prudent purely from the point of view of net country-wide savings. Only if power generation moves towards full decarbonisation would there be a reasonable chance of achieving the more ambitious CERC domestic emissions pathway. However, the significant additional cost associated with achieving the domestic emissions pathway should be conditional on international assistance.
Key policy insights
South Africa can only achieve its ‘fair share’ of the global mitigation effort if greater use is made of renewable energy options, and can realise significant net savings if it does so.
Further emissions reductions would incur costs and require significant upscaling of the share of renewable energy and full implementation of all non-power generation mitigation measures available.
Committing to this further mitigation action contingent on international finance would both strengthen the nation’s position in climate negotiations and support the provision of finance for those vulnerable developing nations that bear little or no responsibility for climate change.
Many actions to reduce GHG emissions have wider impacts on health, the economy, and the environment, beyond their role in mitigating climate change. These ancillary impacts can be positive (co-benefits) or negative (conflicts). This article presents the first quantitative review of the wider impacts on health and the environment likely to arise from action to meet the UK's legally-binding carbon budgets. Impacts were assessed for climate measures directed at power generation, energy use in buildings, and industry, transport, and agriculture. The study considered a wide range of health and environmental impacts including air pollution, noise, the upstream impacts of fuel extraction, and the lifestyle benefits of active travel. It was not possible to quantify all impacts, but for those that were monetized the co-benefits of climate action (i.e. excluding climate benefits) significantly outweigh the negative impacts, with a net present value of more than £85 billion from 2008 to 2030. Substantial benefits arise from reduced congestion, pollution, noise, and road accidents as a result of avoided journeys. There is also a large health benefit as a result of increased exercise from walking and cycling instead of driving. Awareness of these benefits could strengthen the case for more ambitious climate mitigation action.
Policy relevance
This article demonstrates that actions to mitigate GHG emissions have significant wider benefits for health and the environment. Including these impacts in cost–benefit analysis would strengthen the case for the UK (and similar countries) to set ambitious emissions reduction targets. Understanding co-benefits and trade-offs will also improve coordination across policy areas and cut costs. In addition, co-benefits such as air quality improvements are often immediate and local, whereas climate benefits may occur on a longer timescale and mainly in a distant region, as well as being harder to demonstrate. Dissemination of the benefits, along with better anticipation of trade-offs, could therefore boost public support for climate action. 相似文献
The economic benefits of the adoption of conservation tillage depend on site-specific factors including soil characteristics,
local climatic conditions, cropping patterns, and other attributes of the overall farming operation. While it is possible
to draw some general inferences about components of economic returns and costs, a comprehensive assessment of the net private
benefits from greater use of conservation tillage is not feasible.
Received: 4 December 1997 · Accepted: 30 March 1998 相似文献
Transaction costs (TCs) must be taken into account when assessing the performance of policy instruments that create markets for the diffusion and commercialization of low-carbon technologies (LCTs). However, there are no comprehensive studies on the development and application of transaction cost analysis to LCTs. In this meta-analysis, a wide-ranging evaluation of TCs associated with energy efficiency, renewable energy, and carbon market technologies is provided. There is a plethora of different definitions of, and measurement techniques to estimate, TCs. There is wide variation in the quantitative estimates, which can be attributed to factors such as the definition used, data collection, quantification methods, the type and size of technologies, the regulatory frameworks, the complexity of transactions, and the maturity of policy instruments. It is concluded that TCs are highly specific to both LCTs and policy instruments and that a common methodological approach is needed to avoid misleading policy analysis of the extant and future assessments. Policy relevance Transaction costs (TCs) accrued by, for instance, the search for information, due diligence, monitoring and verification (M&V) activities, must be considered in the design, implementation, and assessment of policy instruments. Such costs can have a negative effect on the performance of policy instruments aimed at the diffusion and commercialization of low-carbon technologies. It is shown here that TC analysis is mostly technology and policy context-specific and hence that it is not advisable to make generalizations about sources and estimates. The nature and scale of TCs are likely to differ due to a variety of endogenous determinants (e.g. size and performance of technologies), exogenous drivers (e.g. regulatory policy frameworks), and methodological aspects (e.g. quantification techniques). Several measures and strategies have the potential to reduce TCs, including standardized full cost accounting systems, an ex ante M&V approach, project bundling, and streamlining of procedures. 相似文献
Recognizing the potential for over- as well as under-estimating the mitigation costs of non-CO2 greenhouse gases in an offset programme, this article examines the accuracy of cost estimates prepared by government agencies for the control of other types of emissions from small/medium sources via an offset programme. Specifically, analogy is made to the control of SOx and NOx controlled by California's Regional Clean Air Incentives Market (RECLAIM) Program. Even allowing for the energy crisis in 2000–2001 that drove up NOx emissions and control costs, it appears that the engineering cost methods used turned out to be generally accurate, defined as ±25%. Although such a finding does not ensure that the same results will apply to the case of non-CO2 GHGs, it certainly reinforces the growing literature on ex ante—ex post cost comparisons of environmental controls. 相似文献
This article explores the critical role of labour market imperfections in climate stabilization cost formation, using a dynamic recursive energy—economy model that represents a second-best world with market imperfections and short-run adjustment constraints along a long-term growth path. The degree of rigidity of the labour markets is a central parameter, and a systematic sensitivity analysis of the model results confirms this. When labour markets are represented as highly flexible, the model results are in the usual range of the existing literature; that is, less than 2% GDP losses in 2030 for a stabilization target at 550 ppm CO2 equivalent. However, when labour market rigidities are accounted for, mitigation costs increase dramatically. Accompanying measures are identified, namely labour subsidies, which guarantee against the risk of large stabilization costs in the case of high rigidities of the labour markets. This complements the usual view that mitigation is a long-term matter that depends on technology, innovation, investment and behavioural change. The results support the view that mitigation is also a shorter-term issue and a matter of transition with regard to the labour market. 相似文献
Until now, there has been little empirical evidence that EU Emissions Trading Scheme (ETS) transaction costs are incurred at firm level. The transaction costs (internal costs, capital costs, consultancy and trading costs) incurred by Irish firms under the EU ETS during its pilot phase (2005–2007) were measured and analysed. Evidence for the sources of transaction costs, their magnitude and the distribution of costs shows that these were mainly administrative in nature. Considerable variation in costs was found due to economies of scale, as the costs per tonne of CO2 were lower for participants with larger allocations. For the largest firms—accounting for over half the emissions—average transaction costs were €0.05 per tonne. However, for small firms, average transaction costs were €2.02—over 18% of the current allowance price. This supports the concerns that transaction costs are excessive for smaller participants. The immediate policy implication is that additional attention will be needed to address different sizes of firms, number of installations per firm, and the size of the initial allocations. 相似文献