Dams, hydropower, roads, and other development affect two-thirds of the world's longest rivers, according to a groundbreaking study by WWF and partners. View our maps of the world's last free-flowing rivers and see how you can help.
Explore the river maps ►
Deadline approaching: Stop Pebble Mine
The plan for Pebble Mine will devastate the pristine ecosystem of Bristol Bay, Alaska. Speak up now to save its waterways and wildlife.
Take action now ► Why biodiversity matters
What does "biodiversity" mean, and why is it so important? Also, see why a new report says around 1 million animal and plant species may face extinction.