Access a range of climate-related reports issued by government agencies and scientific organizations. Browse the reports listed below, or filter by scope, content, or focus in the boxes above. To expand your results, click the Clear Filters link.
This special report from the Intergovernmental Panel on Climate change describes the impacts of global warming of 1.5 °C above pre-industrial levels. The report also describes potential global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty.
As incomes rise and populations grow, especially in the world’s hotter regions, the use of air conditioners is becoming increasingly common. In fact, the use of air conditioners and electric fans already accounts for about a fifth of the total electricity in buildings around the world–or 10 percent of all global electricity consumption. Over the next three decades, the use of ACs is set to soar, becoming one of the top drivers of global electricity demand. This new analysis by the International Energy Agency shows how new standards can help the world avoid facing such a “cold crunch” by helping improve efficiency while also staying cool.
In 1950, fewer than one-third of the world's people lived in cities. Today more than half do. By 2050, urban areas will be home to some two-thirds of Earth's human population. This scale and pace of urbanization has never been seen in human history.
The report provides a foundation for new scientific collaborations on how cities function, how they grow, and how they can be managed sustainably for decades to come.
On March 13, 2017, the Roundtable on Environmental Health Sciences, Research, and Medicine and the Roundtable on Population Health Improvement jointly convened a 1-day public workshop in Washington, DC, to explore potential strategies for public health, environmental health, health care, and related stakeholders to help communities and regions to address and mitigate the health effects of climate change. Participants discussed the perspectives of civic, government, business, and health-sector leaders, and existing research, best practices, and examples that inform stakeholders and practitioners on approaches to support mitigation of and adaptation to climate change and its effects on population health. This publication summarizes the presentations and discussions from the workshop.
From Mayor Mitchell J. Landrieu's Introduction: As we marked the 10th anniversary of Hurricane Katrina in 2015, we launched the world’s first comprehensive city resilience strategy, Resilient New Orleans, combining local expertise with global best practices to confront our most urgent threats, adapt our city to our changing natural environment, invest in equity, create flexible and reliable systems, and prepare for future shocks.
It is not enough to plan for how we will adapt to climate change. We must end our contribution to it. As the world committed to action in Paris in 2015, so too did we. I signed the Global Covenant of Mayors on Climate & Energy, adding New Orleans to the team of more than 7,400 cities in 119 countries worldwide committed to taking climate action.
Forest and grassland ecosystems provide a wide range of services, including wood products, recreation, wildlife habitat, and protection of water quality. These ecosystems are also extremely valuable for their ability to store carbon, with U.S. forests absorbing more than 600 million metric tons of carbon each year. This report describes the role of forests and grasslands in the carbon cycle and outlines considerations for managing for carbon as one of many environmental benefits provided by natural ecosystems. Land management activities can influence the ability of ecosystems to absorb and sequester carbon, as well as provide other ecosystem services, and this report explores considerations for land managers interested in increasing carbon benefits on the lands that they manage.
This guidebook results from the culmination of a year of dialogue among diverse stakeholders in southeastern Connecticut who defined challenges and solutions from extreme weather, climate change, and shifting social and economic conditions. Participants included representatives from nine municipalities, public and private utilities, public health departments, chambers of commerce, major employers, conservation organizations, academic institutions, community non-profits, and state agencies, among others. The dialogue captured six themed planning sectors (water, food, ecosystem services, transportation, energy, and regional economy) in a process that used surface and integrated solutions to address singular and multiple challenges across planning sectors. The guidebook provides a quick reference resource to help shape and inform actions that will advance a regional resilience framework for southeastern Connecticut; an accompanying Summary of Findings captures the project's final outcomes and conclusions, as well as providing a comprehensive account of the objectives, process, and details.
This user-friendly summary is based on the 2015 report “City of Long Beach Climate Resiliency Assessment Report" and “Appendices” prepared by the Aquarium of the Pacific at the request of Mayor Robert Garcia. The report includes clear infographics that describe current and projected conditions in the city. It also describe what the city is currently doing and what else the city and its residents can do.
A private group, the Climate Leadership Council, describes "How a new climate strategy can strengthen our economy, reduce regulation, help working-class Americans, shrink government & promote national security." The group of conservative elder statesmen that authored the statement call it the first time leading Republicans have put forth a concrete, market-based climate solution. Their recommendations are built on four pillars: (1) a gradually increasing carbon tax, (2) carbon dividends for all Americans, (3) border carbon adjustments, and (4) significant regulatory rollback.
This report is part of a series of six case studies that explore lessons that are being learned by climate collaboratives from around the United States that are bringing together local governments and other stakeholders at the regional level to both reduce carbon pollution (mitigation) and prepare for the impacts of climate change (adaptation). Each case study explores the history and development structure and decision-making methods, funding sources, roles, and initiatives of each of these climate collaboratives. A synthesis report also explores lessons that can be learned by comparing the efforts of each collaborative on climate policy in their regions. These case studies were supported by a grant from the Kresge Foundation. In developing these case studies, the Georgetown Climate Center collaborated with the Alliance of Regional Collaboratives for Climate Adaptation (ARCCA).
Since 2010, United Nations Environment (UNEP) has produced annual Emissions Gap Reports based on requests by countries for an independent scientific assessment of how actions and pledges by countries affect the global greenhouse gas emissions trend, and how this compares to emissions trajectories consistent with the long-term goal of the United Nations Framework Convention on Climate Change. The difference has become known as the emissions gap. In addition to estimating the emissions gap, the reports focus on key options for achieving the emissions reductions necessary to bridge the gap, and provide an assessment of how these can be accelerated and scaled up. Countries have found these emissions gap assessments useful in informing the political process. This seventh Emissions Gap Report is based on requests by countries for an update that focuses on some of the key issues emerging with the adoption of the Paris Agreement and its specific long-term temperature goal.
Emeryville is the first city in California's Bay Area to update its Climate Action Plan and align its greenhouse gas (GHG) emissions targets with the State of California’s climate targets. This Climate Action Plan 2.0 includes updates to Emeryville’s 2008 Climate Action Plan, looking towards state targets for reducing 40 percent below baseline levels of GHG emissions by 2030 and 80 percent below baseline levels by 2050. The CAP 2.0 meets the compliance for the Global Covenant of Mayors, a platform for standardizing climate change action planning for local city governments and demonstrating local commitment to climate change mitigation and adaptation. The plan contains GHG targets, updated GHG community and municipal inventories, business-as-usual GHG forecast, deep decarbonization vision for 2050, adaptation and mitigation action plans, and a monitoring plan. With 17 mitigation goals, five adaptation goals, over 100 combined initiatives for 2030, and five long-term strategies for 2050, this CAP 2.0 represents a strong step in reducing emissions and building climate resilience.
This report promotes a relatively simple solution to the problem of increasing heat and air pollution in cities: plant more trees. Trees cool the air by casting shade and releasing water vapor, and their leaves can filter out fine particulate matter (PM)—one of the most dangerous forms of air pollution, generated from burning biomass and fossil fuels.
The report documents analysis that tree planting efforts could improve the health of millions of people, and that trees are as cost-effective as many other common solutions. The report also shows that most of the cooling and filtering effects created by trees are fairly localized, so densely populated cities—as well as those with higher overall pollution levels—tend to see the highest overall return on investment (ROI) from tree plantings.
This annual report details the progress made in reducing costs and ramping up deployments of clean energy technologies. In particular, the report highlights the progress of five clean energy technologies: wind turbines, solar technologies for both utility-scale and distributed photovoltaic (PV), electric vehicles, and light-emitting diodes (LEDs). The report also highlights emerging technologies that the Department of Energy believes have the potential to transform our energy sector over the next five to ten years. These include fuel-efficient technologies for heavy trucks, smart building controls, and vehicle lightweighting. Along with updates in these areas, the report also highlights the accomplishments and potential of fuel cells, industrial energy management, grid-scale batteries, and big area additive manufacturing.
This two-part report is the result of workshops convened in 2015 and 2016. The Part 2 reports documents the second workshop, which brought federal and state coastal managers together with statutory authorities for review and permitting of marine aquaculture in federal waters off the coast of southern California with scientists and other stakeholders.
This two-part report is the result of workshops convened in 2015 and 2016. The Part 1 report documents participants' efforts to develop frames of reference and rationale for creation of an offshore finfish aquaculture industry in southern California.
Blacksburg's Climate Action Plan represents both a short- and long-term set of strategies to pursue to reach the community’s energy and climate action goals. The long-range goal, established by Town Council in 2007, is to reduce community-wide greenhouse gas emissions by 80 percent below 1990 levels by 2050. Blacksburg’s Climate Action Plan is divided into six chapters covering the major sectors of the community responsible for Blacksburg’s greenhouse gas emissions. Citizens' priority strategies are reflected in each of the sector chapters in three ways: a set of “Individual Actions” that citizens can choose to adopt in their own lives, shorter time-horizon “Let’s Get Started” strategies, and longer-term “Looking Ahead” strategies.
This document provides final guidance for federal agencies on how to consider the impacts of their actions on global climate change in their National Environmental Policy Act (NEPA) reviews, providing a framework for agencies to consider both the effects of a proposed action on climate change, as indicated by its estimated greenhouse gas emissions, and the effects of climate change on a proposed action. The memorandum applies to all types of proposed federal agency actions that are subject to NEPA analysis and guides agencies on how to address the greenhouse gas emissions from federal actions and the effects of climate change on their proposed actions within the existing NEPA regulatory framework.
The cold temperatures of Alaska have led to the storage of vast quantities of soil and vegetation carbon, yet high-latitude ecosystems are potentially more vulnerable to higher temperature changes than ecosystems in the temperate zone. In particular, these increases in temperature may expose the substantial stores of carbon in the region to loss from more wildfire and permafrost thaw, which could turn the ecosystems of Alaska into a net carbon source. The assessment of Alaska ecosystem carbon stocks and fluxes, as well as methane fluxes, as reported here was conducted to better understand the baseline and projected carbon distributions and potential responses to a rapidly changing environment.
On Earth Day 2015, Connecticut Governor Malloy issued Executive Order 46 creating the Governor’s Council on Climate Change, also known as the GC3. The Council is to examine the effectiveness of existing policies and regulations designed to reduce greenhouse gas emissions and identify new strategies to meet the state’s greenhouse gas emissions reduction target of 80 percent below 2001 levels by 2050. It will do so, in part, by developing interim state-wide greenhouse gas reduction targets for years between 2020 and 2050 and by identifying short- and long-term statewide strategies to achieve the necessary reductions.
In January 2015, Long Beach Mayor Robert Garcia asked the Aquarium of the Pacific to take a lead in assessing the primary threats that climate change poses to Long Beach, to identify the most vulnerable neighborhoods and segments of the population, and to identify and provide a preliminary assessment of options to reduce those vulnerabilities. Over the course of 2015, the Aquarium hosted and participated in meetings and workshops with academic and government scientists, business and government leaders, local stakeholders, and Long Beach residents to discuss key issues facing our community as the result of climate change. This report, completed in December 2015, represents the culmination of these efforts. The report offers detailed assessments of the five main threats of climate change to Long Beach: drought, extreme heat, sea level rise and coastal flooding, deteriorating air quality, and public health and social vulnerability. It also provides an overview of what is currently being done to mitigate and adapt to these threats, and other options to consider. Finally, this report presents a series of steps and actions that city leaders and community stakeholders can use as a template for making Long Beach a model of a climate resilient city.
The Global Warming Solutions Act of 2008 required the Massachusetts Secretary of Energy and Environmental Affairs to set a limit on greenhouse gas emissions that would lead to a 10–20 percent reduction in emissions by 2020, and an 80 percent reduction by 2050. This update to Massachusetts' 2010 Climate Action Plan includes recommendations on how to achieve this goal.
This report documents recommendations made by the Virginia Climate Commission and describes how they were acted upon. Highlights include appointment of a Chief Resilience Officer and development of a protocol for sea level rise projections. The report also makes 113 recommendations to help Virginia adapt to the consequences of climate change, and to reduce Virginia’s contributions to the problem.
With the goal of creating a cleaner San Diego for future generations, the City of San Diego’s Climate Action Plan calls for eliminating half of all greenhouse gas emissions in the City and aims for all electricity used in the city to be from renewable sources by 2035. The Climate Action Plan is a package of policies that will benefit San Diego’s environment and economy. It will help create new jobs in the renewable energy industry, improve public health and air quality, conserve water, more efficiently use existing resources, increase clean energy production, improve quality of life, and save taxpayer money. The plan identifies steps the City of San Diego can take to achieve the 2035 targets, including creating a renewable energy program, implementing a zero waste plan, and changing policy to have a majority of the City’s fleet be electric vehicles. The Climate Action Plan helps achieve the greenhouse gas reduction targets set forth by the State of California. The City’s first Climate Action Plan was approved in 2005 and a commitment to update the plan was included in the City’s 2008 General Plan update.
King County, Washington's Strategic Climate Action Plan sets forth strategies for reducing greenhouse gas emissions and preparing for climate change impacts.
This report updates the information contained within Maryland's 2012 Greenhouse Gas Reduction Act (GGRA) Plan. This document summarizes the state’s progress toward achieving the 2020 emissions reduction goal established by the GGRA and shows that Maryland is on target to not only meet, but to exceed, its emission reduction goal.
The purpose of this document is to promote state policy recommendations and actions that aim to help improve Colorado’s ability to adapt to future climate change impacts and increase Colorado’s state agencies' levels of preparedness, while simultaneously identifying opportunities to mitigate greenhouse gas emissions at the agency level.
This report discusses impacts of Hurricane/Post Tropical Cyclone Sandy on fishing and fishing-related businesses in New York and New Jersey one year after landfall. It describes major factors leading to different levels of impact on different sectors, and some reasons behind these different impact levels. Further examined are types of impediments to recovery, aids to recovery, and community impacts. It concludes with (1) two factors that can potentially improve response to, and lessen impacts of, future natural disasters, and (2) lessons learned by the researchers.
In 1993, Portland was the first U.S. city to create a local action plan for cutting carbon. Portland’s Climate Action Plan is a strategy to put Portland and Multnomah County on a path to achieve a 40 percent reduction in carbon emissions by 2030 and an 80 percent reduction by 2050 (compared to 1990 levels). The 2015 Climate Action Plan builds on the accomplishments to date with ambitious new policies, fresh research on consumption choices, and engagement with community leaders serving low-income households and communities of color to advance equity through the City and County’s climate action efforts.
Successfully negotiating climate change challenges will require integrating a sound scientific basis for climate preparedness into local planning, resource management, infrastructure, and public health, as well as introducing new strategies to reduce greenhouse gas emissions or increase carbon sequestration into nearly every sector of California’s economy. This Research Plan presents a strategy for developing the requisite knowledge through a targeted body of policy-relevant, California-specific research over three to five years (from early 2014), and determines California’s most critical climate-related research gaps.
In September of 2013, Governor Jack Markell of Delaware signed Executive Order 41 directing state agencies to address the causes and consequences of climate change. The order asked for recommendations to reduce greenhouse gas emissions, increase resilience to climate impacts, and find ways to avoid or minimize flood risks caused by rising sea level. The order also created a committee to oversee the development and implementation of recommendations.
This Synthesis Report summarizes the Fifth Assessment Report (AR5) of the Intergovernmental Panel on Climate Change (IPCC). This report distills, synthesizes, and integrates the key findings of the three IPCC Working Group contributions—The Physical Science Basis; Impacts, Adaptation, and Vulnerability; and Mitigation of Climate Change—to the AR5 for the benefit of decision makers in government, the private sector, and the general public. The report also includes findings from two Special Reports released in 2011: Renewable Energy Sources and Climate Change Mitigation and Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation. The Synthesis Report confirms that climate change caused by human activities is having impacts on ecosystems and human well-being across the U.S. and around the world.
Virginia's Governor McAuliffe signed Executive Order 16 establishing the Virginia Energy Council in 2014; the council was formed to provide advice on the development and implementation of the 2014 Virginia Energy Plan. This plan was developed to provide a comprehensive view of where Virginia has been and currently is in terms of its energy assets, and it charts a path forward for energy policy in the commonwealth.
This report documents how rapid innovation and new investment in infrastructure are making it possible to tackle climate change and improve economic performance. Countries at all income levels have the opportunity to build lasting economic growth at the same time as they reduce the immense risk of climate change.
The report highlights the state’s achievement of returning to 1990 emissions levels by 2010. Additionally, Connecticut is likely to meet its goal of acheiving emissions levels 10 percent below 1990 levels before 2020. The report also presents the state’s climate adaptation and resiliency work.
The National Climate Assessment assesses the science of climate change and its impacts across the United States, now and throughout this century. It documents climate change-related impacts and responses for various sectors and regions, with the goal of better informing public and private decision making at all levels.
The assessment draws from a large body of scientific peer-reviewed research, technical input reports, and other publicly available sources; all sources meet the standards of the Information Quality Act. The report was extensively reviewed by the public and experts, including a panel of the National Academy of Sciences, the 13 federal agencies of the U.S. Global Change Research Program, and the Federal Committee on Environment, Natural Resources, and Sustainability.