The Hudson River is one of the great rivers of the world. Not long ago, it was deeply threatened by pollution. Now it is coming back to life, a river where fish and birds can thrive again, a river valued once more by communities along its shores.The unique environmental education program on board the sloop, "Clearwater," founded by folksinger Pete Seeger, has taught thousands of children and adults to love the river. With this guidebook, "Clearwater" teachers bring their wealth of knowledge about the river to a wider audience.This book covers, for the first time, the full sweep of the river's natural history and human heritage. It introduces you to the Hudson's diversity of plants and wildlife, to the geological forces that created the river, to the people who explored and settled its banks, to the river's enduring place in American history and art, and to the battles waged over its environmental preservation. Its engaging illustrations, maps, and text--distilled from the best research on the Hudson's habitat and history--invite you to explore the river yourself.Royalties from the sale of this book will support the continued restoration of the river's ecological well-being through the programs of the Hudson River Sloop Clearwater, Inc., a nonprofit education and advocacy organization based in Poughkeepsie, New York.