Gaylord Nelson's legacy is known and respected throughout the world. He was a founding father of the modern environmental movement and creator of one of the most influential public awareness campaigns ever undertaken on behalf of global environmental stewardship: Earth Day.     Nelson died in 2005, but his message in this book is still timely and urgent, delivered with the same eloquence with which he articulated the nation's environmental ills throughout the decades. He details the planet's most critical concerns - from species and habitat losses to global climate change and population growth. In outlining strategies for planetary health, Nelson inspires citizens to reassert environmentalism as a national priority. Included in this reprint is a new preface by Gaylord Nelson's daughter, Tia Nelson.