books.google.com - On Earth Day 1970 twenty million Americans displayed their commitment to a clean environment. It was called the largest demonstration in human history, and it permanently changed the nation’s political agenda. More than 1 billion people now participate in annual Earth Day activities. The seemingly...https://books.google.com/books/about/The_Man_from_Clear_Lake.html?id=VjE_3L_KbL4C&utm_source=gb-gplus-shareThe Man from Clear Lake
