The Sierra Club is the most enduring and influential grassroots environmental organization in the United States. We amplify the power of our 3.8 million members and supporters to defend everyone's right to a healthy world. Help the Sierra Club keep fighting for Earth's natural resources.

The Nature Conservancy is a global environmental nonprofit working to create a world where people and nature can thrive. Founded in the U.S. through grassroots action in 1951, The Nature Conservancy has grown to become one of the most effective and wide-reaching environmental organizations in the world.

Environmental Defense Fund's mission is to preserve the natural systems on which all life depends. Guided by science and economics, we find practical and lasting solutions to the most serious environmental problems.

NRDC works to protect our world's oceans from pollution and exploitation. Clean water sustains our communities, economies, ecosystems, and health. Unspoiled wilderness protects our watersheds, cleans air, and shelters diverse species.

The National Audubon Society protects birds and the places they need, today and tomorrow, throughout the Americas using science, advocacy, education, and on-the-ground conservation.

WWF works to help local communities conserve the natural resources they depend upon; transform markets and policies toward sustainability; and protect and restore species and their habitats. Our efforts ensure that the value of nature is reflected in decision-making from a local to a global scale.

Greenpeace is an independent, nonprofit, global campaigning organization that uses non-violent, creative confrontation to expose global environmental problems and their causes. Greenpeace's goal is to ensure the ability of Earth to nurture life in all its diversity.

WCS saves wildlife and wild places worldwide through science, conservation action, education, and inspiring people to value nature.

350.org is building a global grassroots movement to solve the climate crisis. Our online campaigns, grassroots organizing, and mass public actions are led from the bottom up by thousands of volunteer organizers in over 188 countries.

Building upon a strong foundation of science, partnership and field demonstration, Conservation International empowers societies to responsibly and sustainably care for nature, our global biodiversity, for the well-being of humanity.

We are building an alliance to protect forests, improve the livelihoods of farmers and forest communities, promote their human rights, and help them mitigate and adapt to the climate crisis.

The mission of the National Parks Conservation Association (NPCA) is to protect and enhance America's National Parks for present and future generations. Established in 1919, NPCA is an independent, nonpartisan voice working to address major threats facing the National Park System.

Earthjustice is the premier nonprofit public interest environmental law organization. We wield the power of law and the strength of partnership to protect people's health, to preserve magnificent places and wildlife, to advance clean energy, and to combat climate change.

Defenders of Wildlife works on the ground, in the courts, and on Capitol Hill to protect and restore imperiled wildlife and habitats across North America.

Rainforest Action Network preserves forests, protects the climate and upholds human rights by challenging corporate power and systemic injustice through frontline partnerships and strategic campaigns.

The Earth Policy Institute functioned as a think-tank, providing policy research and recommendations on sustainable development and living, as well as on environmental issues.

RMI is an independent, non-partisan, non-profit organization of experts across disciplines working to accelerate the clean energy transition and improve lives. Since our founding in 1982 by Amory Lovins, RMI's chairman emeritus, we have grown to 300 staff working on four continents with a global reach and reputation.

Our mission: to use rigorous, independent science to solve our planet's most pressing problems. Joining with people across the country, we combine technical analysis and effective advocacy to create innovative, practical solutions for a healthy, safe, and sustainable future.

Oceana seeks to make our oceans more biodiverse and abundant by winning policy victories in the countries that govern much of the world's marine life. Oceana, founded in 2001, is the largest international advocacy organization focused solely on ocean conservation.

The National Wildlife Federation, America's largest and most trusted conservation organization, works across the country to unite Americans from all walks of life in giving wildlife a voice.

Green America's mission is to harness economic power - the strength of consumers, investors, businesses, and the marketplace - to create a socially just and environmentally sustainable society.

The National Geographic Society uses the power of science, exploration, education and storytelling to illuminate and protect the wonder of our world.

Ocean Conservancy is working with you to protect the ocean from today's greatest global challenges. Together, we create science-based solutions for a healthy ocean and the wildlife and communities that depend on it.

Since 1997, Sustainable Harvest International has been working consistently with communities in Central America to fight poverty, hunger, and deforestation. We're working to change the story of environmental degradation and economic responsibility with practical training in more sustainable farming methods.

The Forest Stewardship Council sets standards for responsible forest management. A voluntary program, FSC uses the power of the marketplace to protect forests for future generations. Some people feel the best way to prevent deforestation is to stop using forest products.

American Forests creates healthy and resilient forests, from cities to wilderness, that deliver essential benefits for climate, people, water and wildlife. We advance our mission through forestry innovation, place-based partnerships to plant and restore forests, and movement building.

Earth Island Institute supports environmental action projects and helps foster the next generation of environmental leaders in order to achieve solutions to the crises threatening the survival of life on Earth. Earth Island was founded in 1982 by legendary environmentalist David Brower.

Heal the Bay is Southern California's water watchdog. Our staff scientists, policy analysts, community organizers, and educators are experts in their fields, working on reducing water pollution, protecting fragile coastal and watershed habitats, and improving water quality throughout greater Los Angeles.

The Surfrider Foundation is dedicated to the protection and enjoyment of the world's ocean, waves and beaches, for all people, through a powerful activist network.

OUR MISSION IS TO CATALYZE A GLOBAL SOLUTION TO THE CLIMATE CRISIS BY MAKING URGENT ACTION A NECESSITY ACROSS EVERY SECTOR OF SOCIETY. The Earth is facing a climate crisis, driven by fossil fuels. At Climate Reality, we're here to make urgent action a necessity. In politics.

EESI works to advance policy solutions that reduce greenhouse gas emissions and ground-level air pollution; improve public health, energy security, and economic development opportunities; and increase use of renewable energy and energy efficiency.

One Tree Planted is a 501C3 non-profit with a focus on global reforestation. As an environmental charity, we are dedicated to making it easier for individuals and businesses to give back to the environment, create a healthier climate, protect biodiversity and help reforestation efforts around the world.