We shall continue to have a worsening ecologic crisis until we reject the Christian axiom that nature has no reason for existence save to serve man. – Lynn White, Jr., "The Historical Roots of Our Ecologic Crisis," 1967
To waste, to destroy our natural resources, to skin and exhaust the land instead of using it so as to increase its usefulness, will result in undermining in the days of our children the very prosperity which we ought by right to hand down to them amplified and developed. – Theodore Roosevelt, seventh annual message, 3 December 1907

