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The report examines the feasibility of reaching the $100 billion annual climate finance goal by 2020 through four scenarios of varying inclusivity. It finds that relying solely on developed country climate finance is insufficient, while a combination of public flows—including multilateral development bank (MDB) finance and climate-related official development assistance (ODA)—alongside leveraged private sector investment makes the target achievable even under low-growth projections. The analysis highlights a persistent imbalance, with mitigation finance projected to significantly outweigh adaptation finance across all scenarios.

The study analyzes 48 bottom-up energy system scenarios for Japan's 2030 GHG emissions. It finds that high-mitigation scenarios consistent with a 2°C target result in emissions 16-39% below 1990 levels. The authors argue that a minimum reduction of 25% from 1990 levels is necessary, which could be achieved through a combination of restarting nuclear reactors, increasing renewable energy and CCS deployment, and significantly reducing total final consumption (TFC). The paper emphasizes that the choice between coal and natural gas for electricity is as critical as the share of renewables, noting that unabated coal-fired power must remain below 21% to achieve reductions exceeding 20% from 1990 levels.

The document details the methodology for the Aqueduct Water Risk Atlas Global Maps 2.1, which updates the 2013 version by incorporating GLDAS-2 NOAH v. 3.3 runoff data. It outlines 12 indicators categorized into physical risk (quantity and quality) and regulatory and reputational risk. The framework utilizes a combination of public domain data, literature reviews, and original datasets to estimate water availability and use at the hydrological catchment scale. Key metrics include baseline water stress, inter-annual and seasonal variability, flood and drought severity, and groundwater stress, alongside socio-economic indicators like media coverage and access to water.

The document details the construction of the Aqueduct Water Risk Atlas, which uses a composite index approach to map global water risks. It describes the development of six modeled indicators (baseline water stress, inter-annual variability, seasonal variability, upstream storage, return flow ratio, and upstream protected land) and the adaptation of six externally sourced indicators (flood occurrence, drought severity, groundwater stress, media coverage, access to water, and threatened amphibians). The methodology involves using an ensemble of regression models to project water withdrawals to 2010, spatial disaggregation to the catchment scale, and a catchment-to-catchment flow accumulation approach for water supply. The final water risk scores are generated through a linear weighted aggregation process, allowing users to customize weights based on their specific sector or risk sensitivity.

The document examines carbon pricing mechanisms, specifically carbon taxes and cap-and-trade programs, as a core strategy for reducing greenhouse gas emissions in the United States. It details design features such as scope, point of regulation, and cost-containment mechanisms, while analyzing various ways to utilize generated revenues—including tax cuts, deficit reduction, and dividends—to offset economic impacts and increase political viability. The authors argue that a well-designed carbon price can provide a 'double dividend' of environmental benefit and economic efficiency.

The briefing outlines the anticipated US climate commitment to reduce greenhouse gas emissions by 26 to 28 percent below 2005 levels by 2025. It emphasizes that for the US proposal to be effective and transparent, it should clarify implementation pathways, address the fairness and ambition of its contribution relative to global goals, and provide clear data on base years and market mechanisms.

The World Resources Institute provides a comprehensive list of information elements that Parties may include in their INDCs to improve transparency. Based on the Lima Call for Climate Action and Greenhouse Gas Protocol standards, the guide details requirements for reference points, implementation timeframes, scope, planning processes, methodological assumptions, and justifications for fairness and ambition.

The document outlines a comprehensive list of information elements for Parties to include in their INDCs, focusing on quantifiable data regarding baselines, timeframes, scope, planning processes, and methodological assumptions. It specifically details requirements for greenhouse gas (GHG) accounting, the use of international market mechanisms, and the treatment of the land sector. Additionally, it suggests indicators for demonstrating the fairness and ambition of contributions in relation to national circumstances and the goals of the Convention.

The document outlines seven categories of detailed upfront information for Parties submitting INDCs: reference points, implementation time frames, scope and coverage, planning processes, methodological assumptions, justifications for fairness and ambition, and other contextual information.

The briefing outlines the unique energy context of India—characterized by high total emissions but low per capita emissions—and proposes four areas for US-India cooperation: facilitating investment in renewable energy, leading a global clean energy collaborative, expanding climate resilience partnerships through data access, and establishing direct high-level communication to support the 2015 Paris climate agreement.

The World Resources Institute (WRI) responds to the 2015 State of the Union address by endorsing President Obama's science-based approach to climate change. WRI highlights the administration's recent achievements, including a joint emissions commitment with China and a $3 billion pledge to the Green Climate Fund, while urging a continued focus on ambitious power plant standards and renewable energy to drive economic growth and global cooperation.

The authors contend that current 'business-as-usual' urbanization, characterized by car-oriented infrastructure, leads to high greenhouse gas emissions, economic losses from congestion, and safety risks. They advocate for 'smart urban mobility'—which combines technology with coordinated planning—to 'leapfrog' car-centric development. Examples of successful interventions include Mexico City's Metrobús BRT, Beijing's low emission zone, and Medellín's Metrocable. The document highlights 2015 as a pivotal year due to the finalization of the UN Sustainable Development Goals, upcoming climate negotiations, and the UN Decade of Action on Road Safety.

The paper examines the conflict between bioenergy production and the global need for food, feed, and carbon sequestration. It argues that dedicated land use for bioenergy—including crop-based biofuels and cellulosic energy crops—exacerbates a projected 70 percent crop calorie gap by 2050. The authors contend that bioenergy is an inefficient use of solar radiation compared to solar photovoltaics (PV), which can produce over 100 times more energy per hectare. Furthermore, the document identifies a systemic 'double counting' error in greenhouse gas accounting that erroneously treats biomass as carbon-free. It recommends phasing out subsidies and mandates for land-dedicated bioenergy while prioritizing 'additional' biomass sources such as municipal waste and specific residues.

The paper proposes four complementary mechanisms to enhance the UNFCCC's effectiveness for the 2015 agreement: specifying a global long-term emissions goal (such as net zero by mid-century), establishing a predictable commitment cycle for national contributions, ensuring each cycle results in increased emissions reductions, and implementing an assessment and revision process to identify further low-carbon policies.

The document argues that the 2015 climate change agreement requires a new mitigation architecture that balances national ownership with multilateral coherence to keep global temperature rise below 2°C. It suggests a system of "levels" of guidance for emission reduction offers, starting with simple common parameters and increasing in complexity, alongside a systematic and frequent approach to submitting and reviewing offers to drive necessary reductions.

The guide outlines a process for civil society organizations to monitor adaptation finance, from analyzing national contexts and compiling international data to mapping funding flows and designing local tracking tools. It emphasizes the use of evidence-based advocacy to ensure funds reach the most vulnerable populations.

The restoration of China's Loess Plateau, supported by the Chinese government and the World Bank, utilized terracing and afforestation to combat severe soil erosion and sand storms. While the project significantly increased grain output, reduced sediment in the Yellow River by 99%, and boosted rural incomes, it faces sustainability risks. These include a high percentage of farmers who would recultivate slopes if subsidies end, low survival rates of non-native tree species, and concerns that large-scale afforestation may exacerbate water shortages in a warming climate.

Between 1986 and 2005, Costa Rica increased its forest area by 394,000 hectares, primarily through passive restoration on abandoned pastures. This success is attributed to a combination of crisis-driven motivation, ecological viability, and market shifts—specifically the decline of the cattle industry and the rise of eco-tourism. While the Pago de Servicios Ambientales (PSA) system is a well-known financial incentive, the document argues that structural economic changes and restrictive forestry laws were equally or more critical to the country's reforestation outcomes.

The HASHI program in Tanzania's Shinyanga region restored 500,000 hectares of woodland by reviving 'ngitili', a traditional Sukuma practice of seasonal livestock enclosures. This effort reversed decades of desertification caused by cash-crop expansion and 'villagization' policies. Success was driven by a combination of traditional knowledge, decentralized governance, and long-term funding from the Norwegian Development Assistance Agency. While the program provided significant economic benefits and reduced workloads for women, it faces ongoing challenges from population growth, socioeconomic disparity in land ownership, and a lack of national monitoring systems.

Between 1920 and 1960, the southern United States experienced a net increase of 6 million hectares of forest cover through a combination of active planting and passive regeneration. This restoration was driven by economic benefits, crisis events like the Great Depression and severe soil erosion, and enabling conditions such as secure property rights and the decline of wood-fired energy. Key implementation tools included the Civilian Conservation Corps and the USDA's Soil Bank Program. However, the trend reversed in the 1970s as suburban expansion became the primary driver of forest conversion, and the region saw a shift toward productive planted forests, such as loblolly and slash pine plantations, which comprised about 20 percent of the total southern U.S. forest area by 2006.