Freepers will predictably crack jokes and write it off as leftist hysteria. The fact that leftist environmentalists can be hysterical and fascist does not mean that conservatives should completely ignore everything they have to say or accept as perfectly normal and tolerable the harm humanity is wreaking on global ecology.
OK.
Mass extinctions an't it.
Can you be more specific?
Last time I checked, homo sapiens sapiens is part of the global ecology, and has been so for over 5 million years...