Audio avec voix humaine
Wheaton College professor John Kricher presents an absorbing analysis of the diverse ecosystems that exist on Planet Earth. He provides a factual study of the many fragile and threatened portions of our biosphere while describing the interaction between each system… and the effect of man's presence in these ecosystems. He also explains the amazing variety of flora and fauna that inhabit the individual ecosystems and addresses current ecological issues facing mankind. 2008.