Search Climate Insights Directory

The report analyzes various policy scenarios for China's energy transition, highlighting that carbon pricing and renewable energy standards are the most powerful tools for reducing emissions. It emphasizes that regulatory policies, particularly energy efficiency standards in buildings and industry, are highly cost-effective. The analysis suggests a transition toward a service-based economy and a decarbonized electricity grid to meet emissions peaking goals by 2030.

The report argues that smart land use policy is critical for California to meet its 2030 decarbonization goals. Using the RapidFire model and E3 California Pathways data, the study finds that 'More Compact' and 'Infill Focus' scenarios can lead to statewide emissions reductions of 40-41% below 1990 levels when combined with aggressive energy technology deployment. Beyond climate targets, smart growth is projected to deliver significant co-benefits, including billions of dollars in household and infrastructure cost savings, improved public health outcomes through reduced air pollution, and the preservation of greenfield land. The authors recommend that the California Air Resources Board (CARB) strengthen emissions reduction targets under SB 375 and provide substantial funding to support cities and regions in implementing target-compliant land use plans.

Energy Innovation used the Energy Policy Simulator to determine that a specific combination of six policies could meet the Clean Power Plan's goal of reducing power sector CO2 emissions by 32 percent by 2030 while saving the U.S. economy nearly 40 billion dollars between 2016 and 2030. The recommended package focuses on improving coal plant efficiency, accelerating coal retirements, enhancing building and industrial energy efficiency, implementing a 25 percent national average renewable portfolio standard, and increasing transmission capacity. The report contrasts this approach with more expensive alternatives, such as those relying heavily on nuclear power or carbon capture and storage.

The report argues that smart growth—characterized by compact, walkable, and transit-oriented development—is essential for California to meet its 2030 climate targets. By combining aggressive energy technology deployment with 'More Compact' or 'Infill Focus' land use scenarios, the state could achieve statewide emissions reductions of 40-41% below 1990 levels. Beyond carbon mitigation, the study quantifies significant co-benefits, including billions of dollars in household and infrastructure cost savings, improved public health outcomes, and the conservation of hundreds of square miles of land.

The Clean Air Task Force (CATF) asserts that allowing interstate trading between states with separate, unmerged emission rate targets creates a perverse economic incentive to operate higher-emitting power plants in states with more lenient targets. This 'leakage' problem would displace lower-emitting generation, leading to higher overall system emissions and increased operating costs. CATF provides a quantitative example showing that relaxing the merger requirement could result in 20 percent more emissions and nearly 50 percent higher dispatch costs. The document further argues that this risk is widespread, noting that 26 states have target emission rates below the 1000 lbs./MWh new source performance standard for natural gas combined cycle (NGCC) units. Finally, it contends that limiting interstate trading to renewable energy credits (RECs) would not solve the problem, as renewable resources in states with higher targets would generate disproportionately more credits, allowing for greater continued use of fossil resources in more stringent states.

The document analyzes China's GPP framework, highlighting the reliance on product lists (ECP and ELP) and the challenges posed by fragmented legal frameworks and administrative overlaps. It proposes a shift toward performance-based specifications and introduces a quantification model to demonstrate the potential benefits of expanding GPP beyond goods to include services and infrastructure.

The document argues that removing global fossil-fuel subsidies, which total $543 billion annually, could reduce greenhouse gas emissions by 6 to 13 per cent by 2050 and save governments between 5 and 30 per cent of expenditure for reallocation toward low-carbon energy and households. It suggests that parties to the UNFCCC can use the Global Subsidies Initiative – Integrated Fiscal model (GSI–IF model) to estimate these reductions for their Intended Nationally Determined Contributions.

The SEI Initiative on the Water, Energy and Food Nexus aims to improve sustainable development by formalizing the interdependencies between water, energy, and agriculture. The initiative is structured around three themes: governing the nexus, understanding the nexus, and implementing the nexus. To achieve this, SEI utilizes a 'nexus toolkit' combining the Water Evaluation and Planning (WEAP) system and the Long-range Energy Alternatives Planning (LEAP) system to quantify development paths and policy impacts. The initiative applies this framework to specific case studies: in Myanmar, it focuses on sustainable river basin development amidst a transition toward universal electricity access by 2030; in Zambia, it seeks to align conflicting sectoral targets in national policy frameworks; and in Colombia, it focuses on balancing sustainable development in the Rio Cravo Sur watershed within the Orinoco region.

The report argues that current international climate targets often rely on incoherent 'effort-sharing' models rather than ethical budget-sharing. It proposes a framework where the global greenhouse gas budget to 2050 is back-calculated from 1990 and divided among nations based on their 1990 share of the global population. Under this model, the EU would have a budget of 204 billion tonnes, of which 57% was used by 2012. The author advocates for international emissions trading of fossil and industrial CO2 to reconcile national responsibilities with cost-effective abatement opportunities. For the EU, the report suggests a domestic trajectory aligned with the 2050 Low Carbon Roadmap (-25% by 2020, -40% by 2030, -60% by 2040, and -80% by 2050) as a minimum unilateral commitment.

The study estimates that the Natura 2000 network stored approximately 9.6 billion tonnes of carbon in 2010, with a monetary value between €607 billion and €1,130 billion. Forest habitats are identified as the most significant carbon sinks. The authors compare a 'Policy ON' scenario (improving conservation status and expanding protected areas) against a 'Policy OFF' scenario (inaction), finding that active policy interventions could generate economic gains of 1.71% to 2.86% by 2020. Specifically, increasing protected forest area by 10% is projected to provide €16 to 23 billion more in immediate benefits than focusing solely on qualitative site improvement.

The report finds a significant surplus of Assigned Amount Units (AAUs) from the first Kyoto commitment period (CP1), totaling 12,637 Mt, which vastly exceeds the estimated demand of 11.5 Mt. It notes that the ability to carry over these surpluses to the second commitment period (CP2) depends on a country's participation in CP2, meaning Russia's stated intent not to join would remove 5.8 Gt CO2e from the available surplus.

The study finds that while both mitigation and adaptation reduce coastal flood impacts, adaptation (specifically dike upgrades) is significantly more effective at reducing the number of people flooded and overall costs. However, mitigation remains critical for less-wealthy and small island countries where flood costs represent a higher percentage of national GDP.

The research investigates the risk of 'double-counting' international offsets, where both the buying developed country and the supplying developing country claim the same emission reduction toward their pledges. Using a spreadsheet model based on McKinsey abatement cost curves, the authors find that if offsets count twice, global abatement could be reduced by up to 1.6 billion tons CO2e in 2020. This dilution could increase the existing emissions gap by as much as 20%, potentially hindering the goal of limiting warming to 2°C. The paper compares this to a 'Buyer Only' scenario and proposes remedies such as shared crediting, partitioning eligible sectors, and implementing a common international transaction tracking mechanism.

The California Water Supply and Demand Model (CWSD) assesses how climate change affects water availability and usage in California, focusing on the energy, urban, and agricultural sectors. The model evaluates scenarios with no adaptation, slow adaptation, and fast adaptation across different climate projections (B1 and A2). Key findings indicate that without adaptation, agricultural water demand will rise due to higher temperatures, particularly in the San Joaquin Valley. While slow adaptation may only marginally reduce use, fast adaptation—driven by higher water prices and technological efficiency—could significantly decrease demand. The report also extends its agricultural analysis to other Western U.S. states, noting a general increase in water demand by 2100.

The document examines the risk of 'double-counting' international greenhouse gas offsets, where both the buyer (developed country) and seller (developing country) count the same emission reduction toward their respective pledges. The authors argue that such accounting could dilute global climate ambition by up to 1.6 billion tons CO2e by 2020, potentially undermining the 2°C warming pathway. The brief analyzes different supply and demand scenarios and proposes policy remedies, such as buyer-only counting, credit-sharing, or the use of an international transaction log to ensure environmental integrity.

The authors argue that current community-scale emissions targets, such as 80% reductions by 2050, do not account for the UNFCCC principle of "common but differentiated responsibility." By applying the Greenhouse Development Rights (GDR) framework to Seattle, the study finds that an equitable global obligation would require the city to become carbon "negative" before 2020. This does not imply physical sequestration but rather a role where wealthy cities dramatically reduce their own emissions while financing low-carbon transitions in developing regions. The paper suggests that communities can use offsets or direct technology and financial transfers to meet these obligations and recommends that local governments integrate global equity into their official climate action plans.

The paper analyzes carbon embedded in China's trade using a Multi-Region Input-Output (MRIO) model. It finds that while China is a net exporter of embedded carbon, this is due to the overall carbon intensity of its economy rather than the specific composition of its exports. The author demonstrates that there is no correlation between revealed comparative advantage and carbon intensity in the Chinese economy. Consequently, the paper argues that border tax adjustments on carbon-intensive imports would have minimal impact on China's trade success and limited benefit for developed countries. Finally, it discusses the theoretical and practical implications of harmonized global carbon prices, suggesting they could enable developing countries to 'leapfrog' to cleaner technologies if supported by public investment.

The Greenhouse Development Rights (GDRs) framework argues that an emergency climate stabilization program is only possible if the international effort-sharing impasse is broken by protecting developmental equity. It proposes a 'development threshold'—set indicatively at $7,500 per person per year (PPP)—below which individuals are exempt from the costs of climate mitigation and adaptation. National obligations are then calculated using a Responsibility and Capacity Indicator (RCI), which combines cumulative emissions since 1990 (responsibility) and income above the threshold (capacity), accounting for intra-national inequality. The report suggests that the United States and European Union bear the largest shares of the global burden, and that wealthy nations must fulfill a 'dual obligation' of aggressive domestic cuts and funding for international reductions to enable the South to decarbonize. To overcome North-South distrust, the authors propose a trust-building period until 2015 characterized by voluntary southern action and legally binding northern commitments.

The report argues that current global development trends are environmentally and socially unsustainable, risking ecological collapse and persistent poverty. It proposes a 'Policy Reform' pathway that maintains the framework of economic globalization but introduces aggressive policy interventions to meet sustainability goals. These goals include halving hunger, unsafe water, and illiteracy by 2025 and again by 2050, while stabilizing atmospheric CO2 concentrations at less than 450 ppmv by 2100. The analysis demonstrates that such a transition is technically feasible through massive improvements in energy and water efficiency, a shift toward renewable energy, and the adoption of sustainable agricultural practices, provided there is sufficient political will to implement these reforms.

The report assesses California's path to a net-zero carbon economy by 2045, specifically examining the necessity of 'clean firm power'—zero-carbon electricity that is available on demand regardless of weather. Using three different optimization models (RESOLVE, urbs, and GenX), the authors find that relying solely on wind, solar, and batteries would require nearly 500 GW of capacity and increase wholesale electricity rates by approximately 65%. In contrast, integrating 25-40 GW of clean firm power—such as nuclear, geothermal, or gas with carbon capture and storage (CCS)—can maintain costs similar to today's levels (around 9 cents/kWh) while significantly reducing the land and transmission infrastructure needed. The report concludes that a diverse portfolio of clean firm resources is the most cost-effective way to ensure grid reliability during extended periods of low renewable output, known as 'dunkelflaute'.