Explore the most impactful non-governmental organizations (NGOs), intergovernmental bodies, and advocacy groups dedicated to combating global warming and promoting environmental sustainability. This ranking highlights key players in climate action, including those focused on policy advocacy, scientific research, conservation efforts, and public awareness campaigns. Discover organizations making significant contributions to reducing greenhouse gas emissions, fostering renewable energy, protecting biodiversity, and adapting to climate change impacts worldwide. Learn about their initiatives, influence, and how they drive international cooperation and local community engagement in addressing the climate crisis.
Advances policies for deep cuts to carbon pollution
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NRDC is an environmental action organization that uses law, science, and the support of millions of members to protect the environment. Its 'GLC Advocacy Summit' in May 2026 and community events demonstrate its power in policy advocacy and grassroots mobilization.
Uses law to create systemic change
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ClientEarth is a leading environmental law organization that uses litigation to protect the planet. Its focus on corporate accountability and the holding of events such as the 'ClientEarth Summit 2026' demonstrate its current influence in the legal fight against climate change.
Educates the public about climate change urgency
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Founded by Al Gore, this organization is dedicated to educating and mobilizing people globally to drive just climate solutions. Celebrating 20 years in 2026, its focus on leadership training and the promotion of clean energy at the municipal level makes it highly relevant.
Provides regular assessments of climate change
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The IPCC is the UN body that assesses the science related to climate change, serving as the primary source for international policy formulation. Its 64th session in March 2026 and the development of its Seventh Assessment Report underscore its continued importance.
Drives sustainable urban development
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ICLEI is a global network that works with over 2,500 local and regional governments for sustainable urban development. Its focus on local-level climate action, evidenced by the 'ICLEI 2026 Local Sustainability Award' and the European Urban Resilience Forum, is fundamental for implementing solutions.
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Provides evidence-based data to inform policy decisions
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UNEP is the leading global environmental authority, setting the global agenda and coordinating efforts. Its Medium-Term Strategy for 2026-2029 and its facilitation of the International Zero Waste Day in 2026 demonstrate its continued leadership.
Focuses on national and international climate action
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WRI is a global research organization that works to protect the Earth and improve people's lives. Its 'Stories to Watch 2026' report and its focus on practical solutions and relevant policies position it as an influential actor in the climate agenda.
Drives ambitious corporate climate action
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Although not exclusively climate-focused, the UN Global Compact is the world's largest corporate sustainability initiative. Its role in mobilizing companies to align their operations with environmental principles and the increase in climate resilience among Spanish companies in 2026 make it crucial.