Sierra Club
Leading the fight for the planet with over 281 coal plants retired and 439 parks and monuments protected
sierraclub.org · 96,886
World Wildlife Fund
Leading organization in wildlife conservation and endangered species, making a difference through action and advocacy.
worldwildlife.org · 79,924
Ecosia
Search engine that plants trees by using ad revenue from searches. Help reforest the planet and empower communities. Join 20 million users in making a difference!
ecosia.org · 59,667
National Audubon Society
Protecting birds and their habitats for a brighter future.
audubon.org · 41,647
EARTHDAY.ORG
Learn about the world's largest environmental movement and how you can make a difference every day.
earthday.org · 24,194
IUCN
Leading nature conservation organization working towards a sustainable future.
iucn.org · 18,979
ACEEE
Leading energy efficiency organization striving for a clean energy future for all Americans.
aceee.org · 17,598
The Nature Conservancy
Protecting lands and waters worldwide to fight climate change and ensure all life thrives. Join the conservation efforts!
nature.org · 16,676
United Nations Framework Convention on Climate Change (UNFCCC)
Official website for the UNFCCC, providing information on Climate Action, Capacity Building, Finance, and more.
unfccc.int · 15,881
Conservation International
Support conservation efforts during Earth Month with a donation to help protect nature and wildlife.
conservation.org · 7,556
National Wildlife Federation
Uniting all Americans to ensure wildlife thrive in a rapidly changing world.
nwf.org · 7,520
Arbor Day Foundation
Nonprofit organization promoting reforestation and urban forestry to address climate change, community, and biodiversity.
arborday.org · 7,152
Rainforest Alliance
Empowering communities to protect the rainforests and biodiversity through sustainable practices. Learn how you can make a difference today!
rainforest-alliance.org · 6,978
WWF Deutschland
Organization for nature and species conservation. Mission to preserve biological diversity - a living planet for us and our children.
wwf.de · 6,754
Ellen MacArthur Foundation
Building a circular economy to fight climate change, biodiversity loss, and pollution. Explore solutions for businesses today.
ellenmacarthurfoundation.org · 5,628
NABU
125 years of dedication to nature and environment. Join us in protecting our natural world, whether in casual attire or formal wear.
nabu.de · 5,494
World Wildlife Fund
Conserving our planet, habitats, and species like the Panda & Tiger through preservation efforts.
panda.org · 5,429
IPBES
The Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) assesses the state of biodiversity and ecosystem services worldwide.
ipbes.net · 5,419
Convention on Biological Diversity
Global agreement covering conservation, sustainable use, and equitable sharing of genetic resources.
cbd.int · 5,239
Florida Fish and Wildlife Conservation Commission
Managing fish and wildlife resources for their long-term well-being and the benefit of people. Explore recreational activities, conservation efforts, hunting and fishing regulations, and more.
myfwc.com · 4,795
Marine Stewardship Council
Promoting sustainable fishing practices for 25 years to preserve our oceans' biodiversity. Join us to end overfishing and choose the blue fish label.
msc.org · 4,557
Woodland Trust
Leading UK woodland conservation charity, planting trees and protecting woods for wildlife and people.
woodlandtrust.org.uk · 3,434
American Forest and Paper Association
Leading organization promoting sustainable practices in the paper and wood products industry.
afandpa.org · 2,903
Acadia Center
Leading Environmental Non-profit Organization for Systemic Clean Energy Solutions
acadiacenter.org · 2,842
International Council on Clean Transportation
Leading the way in clean transportation solutions and policies worldwide.
theicct.org · 2,698
The American Chestnut Foundation
Non-profit organization dedicated to developing disease-resistant American chestnut tree and restoring it to the native range in the eastern United States.
acf.org · 2,509
Adirondack Council
Protecting the Adirondack Park, a unique national treasure, through advocacy and conservation efforts.
adirondackcouncil.org · 2,286
Acterra: Action for a Healthy Planet
Nonprofit environmental organization in Palo Alto, California, bringing people together to create solutions for a healthy planet.
acterra.org · 2,172
American Conservation Coalition
Empowering young Americans to lead the action-first climate movement.
acc.eco · 1,806
Alberta Conservation Association
Working towards conserving wildlife, fish, and their habitats for future generations.
ab-conservation.com · 1,763
Australian Conservation Foundation
Australia's national environment organisation working to protect and restore nature, and take urgent action against climate destruction.
acf.org.au · 1,245
ABAAE - Association for Environmental Education for Sustainability
Empowering youth to take action for a sustainable future through environmental education initiatives.
abae.pt · 1,207
Australian Conservation Foundation
Join Australia's Biggest Bushwalk this May and support nature conservation efforts. The Australian Conservation Foundation is the leading national environment organisation in Australia, working to protect and restore nature for a sustainable future.
acfonline.org.au · 1,134
Agir pour l'Environnement
National citizen mobilization association for a livable planet
agirpourlenvironnement.org · 1,031
Adaptation Fund
Helping developing countries build resilience and adapt to climate change. Updates on projects, events, and resources related to climate adaptation financing.
adaptation-fund.org · 962
Agroforestry.org
Nonprofit organization dedicated to providing educational resources about agroforestry, trees, and sustainable stewardship of land and water.
agroforestry.org · 816
Acción Ecológica
Ecuadorian ecological organization defending people's rights, communities, and nature against extractivist, agribusiness, and environmental devastation models.
accionecologica.org · 690
AFR100
A country-led effort to bring 100 million hectares of land in Africa into restoration by 2030.
afr100.org · 679
American Ground Water Trust
A non-profit organization dedicated to promoting knowledge and understanding of ground water issues.
agwt.org · 636
Agroforestry.Net
Providing educational resources about agroforestry, trees, and sustainable stewardship of land and water.
agroforestry.net · 636
ACAP - Agreement on the Conservation of Albatrosses and Petrels
ACAP is dedicated to the conservation of albatrosses and petrels through best practice advice and mitigation efforts for seabird bycatch.
acap.aq · 613
Autorità di Bacino Distrettuale del Fiume Po
Official website of the District Basin Authority of the Po River, providing information on water policies, biodiversity protection, and ongoing projects in the area.
adbpo.it · 544
Abenteuer Regenwald
Informing children and teenagers about the tropical rainforest and how to protect it.
abenteuer-regenwald.de · 391
AFES - Association Française pour l'Étude du Sol
AFES - Association Française pour l'Étude du Sol is dedicated to promoting the study and awareness of soils.
afes.fr · 357
Adventure Scientists
Empowering volunteers to collect critical field data for conservation and climate solutions.
adventurescientists.org · 312
Afforestt
Creating dense, native forests using pioneering forest creation methods with expertise. Beautiful Forests. Native. Wild. Forever.
afforestt.com · 300
AIB - European Energy Certificate System
Leading the European standardised system for energy certification.
aib-net.org · 282
Agence française pour la biodiversité
French agency for biodiversity providing support for public policies, conducting scientific research, and raising awareness about ecosystems
afbiodiversite.fr · 237
