COVID-19 UPDATE: We are following current health and safety guidelines and have changed usage guidelines for some of our preserves in New York. Please read the message from our Executive Director for more details.
It is who we are and how we work that has brought more than 65 years of tangible lasting results. Explore how we've evolved to tackle some of the world's greatest challenges.
Explore the latest thinking from our experts on some of the most significant challenges we face today, including climate change, food and water security, and city growth.
Connect With Nature
Work alongside TNC staff, partners and other volunteers to care for nature, and discover unique events, tours and activities across the country.
Donate to Our Mission
Stand up for our natural world with The Nature Conservancy. Every acre we protect, every river mile restored, every species brought back from the brink, begins with you.
Long Island Water Quality
Nitrogen pollution threatens Long Island's waters and we have to fix it now.
Southwest Nassau County
Where Does Our Water Come From?
Where Does It Go When I Flush?
What Is Nitrogen Pollution?