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This executive summary, prepared by Friends of the Earth Europe based on a Stockholm Environment Institute (SEI) study, outlines a technically feasible pathway for the European Union to achieve domestic greenhouse gas emission reductions of 40% by 2020 and 90% by 2050. The document advocates for a 'climate justice' approach, combining aggressive domestic decarbonization—excluding nuclear power, carbon capture and storage, and offsetting—with significant financial support for developing nations to meet their development needs in a carbon-free manner.

This report analyzes three transport and mobility energy consumption scenarios for Estonia up to 2050, with a detailed cost-benefit analysis through 2030. It compares a 'Business-as-Usual' (BAU) approach, a 'Low-Intervention' (VS) scenario, and a 'Knowledge-Based' (EE) energy-efficient scenario, evaluating their impacts on energy use, greenhouse gas emissions, and public finances.

This policy brief, produced to inform the Rio+20 United Nations Conference on Sustainable Development, outlines a long-term vision for transforming global energy systems to achieve sustainability. It argues that a fundamental shift is necessary to address simultaneous challenges of energy access, climate change, air pollution, and energy security, emphasizing that such a transition is technologically and economically achievable but requires integrated policy frameworks and scaled-up investments.

This executive summary details a study by the Energy Research Institute (ERI) on China's energy and carbon emissions trajectories from 1998 to 2020. Using three scenarios—Ordinary Effort, Promoting Sustainability, and Green Growth—the report analyzes how different policy priorities regarding energy efficiency and supply structure impact economic growth and greenhouse gas emissions.

This policy brief by the Stockholm Environment Institute outlines a mitigation scenario for the EU27 to meet its 'fair share' of the global climate challenge. It argues that Europe can achieve a 40% reduction in greenhouse gas emissions by 2020 and nearly 90% by 2050 through domestic action, including radical energy efficiency improvements and a shift to renewables, while simultaneously fulfilling international financial obligations to assist developing nations.

The 2015 update to the Massachusetts Clean Energy and Climate Plan for 2020 (CECP Update) outlines the policies the Baker-Polito Administration will use to meet greenhouse gas (GHG) emission reduction goals mandated by the Global Warming Solutions Act of 2008 (GWSA). The report concludes that a reduction of at least 25% below 1990 levels is attainable by 2020 through a comprehensive strategy covering building efficiency, transportation, electricity generation, and non-energy emissions.

This policy brief, produced by the Stockholm Environment Institute Tallinn Centre as part of the NORSTRAT project, examines the transmission grid developments required to transition the Baltic States to a carbon-neutral power sector by 2050. The research focuses on the feasibility of replacing oil shale and fossil fuel dependency with renewable energy sources, specifically wind and biomass, through increased interconnection with the Nordic Power System and Continental Europe.

This executive summary, produced by the Stockholm Environment Institute for the Combat Climate Change (3C) initiative, examines how resource scarcity in biomass, metals, and water could hinder the transition to a low-carbon economy. It evaluates various scenarios for resource availability and proposes strategies—including technological innovation, policy shifts, and efficiency improvements—to ensure the viability of green technologies.

This briefing by the Stockholm Environment Institute examines future pathways for household biomass use in Ethiopia from 2013 to 2030. Using the LEAP model, it compares a baseline scenario with 'moderate shift' and 'high shift' scenarios to evaluate the potential for reducing wood consumption and greenhouse gas emissions through the adoption of improved cookstoves and fuel-switching to electricity, biogas, and bioethanol.

This research paper uses the Climate and Regional Economics of Development (CRED) model to analyze the relationship between climate policy and development assistance. The authors find that while climate and development choices are nearly independent under extreme assumptions of climate risk, development assistance becomes a decisive factor for global climate stabilization under intermediate risk assumptions.

This fact sheet from the Stockholm Environment Institute outlines three energy scenarios from 2009 to 2050: a Baseline scenario (BAS) reflecting business-as-usual trends, a Basic Energy Access scenario (BEA) focusing on universal basic energy access and climate constraints, and a Shared Development Agenda scenario (SDA) which aims for more balanced global income distribution and extensive development in poor regions.

This policy brief, produced by the Stockholm Environment Institute in partnership with the 3C initiative, examines the water-energy nexus within the context of a low-carbon transition. It highlights that while low-carbon electricity technologies are essential for reducing greenhouse gas emissions, some may require as much or more water as fossil-fuel generation, potentially limiting their viability in water-stressed regions. The document provides a detailed case study of California to demonstrate how strategic technology choices—such as prioritizing solar photovoltaics over solar thermal and adopting dry-cooling systems—can simultaneously reduce emissions and water demand.

This position paper, submitted to UNCSD2012 by the Stockholm Environment Institute (SEI) and the Brazilian Foundation for Sustainable Development (FBDS), outlines a global assessment on sustainable energy for all. It argues that energy access must evolve from basic poverty alleviation to supporting productive economic development while remaining within the 'safe operating space' of planetary boundaries to avoid catastrophic environmental disruption.

This fact sheet describes the hydrological modeling of the La Vieja river basin in Colombia using the Water Evaluation and Planning (WEAP) tool. The project, funded by USAID and running from July 2012 to June 2015, aimed to strengthen societal adaptation to climate change in the management of water resources in the Otún and La Vieja river basins.

This research paper presents the results of two multi-stakeholder participatory GIS (PGIS) workshops held in June and July 2014 in the Morogoro region of Tanzania. The workshops aimed to map small-scale dairy production systems, feed sources, and support infrastructure in the Kilosa and Mvomero districts to provide a baseline for the CLEANED-VCs environmental assessment framework. The study identifies various livestock keeping systems, environmental risks such as land encroachment and water scarcity, and explores scenarios for increasing milk yields through improved education, breeding, and fodder production.

This SEI briefing summarizes a regional foresight workshop held in Bangkok in December 2023, conducted as part of a UNEP strategic foresight initiative. The workshop involved 42 academics and practitioners from 15 countries in Asia and the Pacific to analyze plausible future scenarios for the region leading up to 2050, focusing on the intersections of technology, cultural values, economic power, and environmental sustainability.

This policy brief by the Stockholm Environment Institute describes the application of an integrated water-energy-food-ecosystems (WEFE) nexus modeling approach (LEAP-WEAP-MACRO) to the Syr Darya River Basin. It argues that integrated modeling provides more realistic results than siloed approaches and demonstrates that international cooperation among Central Asian countries can increase water availability, boost agricultural production, and reduce greenhouse gas emissions compared to business-as-usual scenarios.

This report describes the development and application of an integrated water-energy-food-ecosystems (WEFE) and macroeconomic model for the Syr Darya River Basin. The model combines three software platforms—Water Evaluation and Planning (WEAP), Low Emissions Analysis Platform (LEAP) with Next Energy Modeling system for Optimization (NEMO), and a macroeconomic model (Macro)—to simulate the interdependencies between water availability, energy production, and economic growth across Kazakhstan, the Kyrgyz Republic, Tajikistan, and Uzbekistan from 2010 to 2050.

This report by Transforma details the energy modeling used to define Colombia's Nationally Determined Contribution (NDC) targets for 2030, 2035, and 2050. Using the Energy Scope open-source tool, the analysis projects a transition from fossil fuels toward a diversified renewable energy matrix, emphasizing solar and wind power to achieve net-zero emissions by 2050.

This policy brief by Transforma analyzes the impact of phasing out coal and gas-fired thermal power plants on Colombia's electricity supply-demand balance between 2025 and 2038. While average energy balances remain positive, the study identifies significant risks to 'firm energy' (guaranteed capacity during critical conditions like droughts), projecting deficits in all phase-out scenarios. The document emphasizes that current planned renewable projects are insufficient to offset the loss of thermal backup and suggests a combination of increased renewable capacity, improved transmission infrastructure, and demand-side management to maintain system stability.