Ch 20,21 The Roaring Twenties
02-Prof. Sutton Environmental Law Outline
Environmental History Chapter 2. Early history Earth has existed for an estimated 4.6 billion years Homo sapiens have been on earth only about 60,000.
Environmental History: An overview. What major Human Cultural Changes have taken place? Age of our solar system - 4.6 billion years Homo sapiens sapiens.
