In any case, with 6.5 bn. people on the planet, we're probably doomed anyway...but we can at least rest assured knowing that the development and evolution of homo sapiens is but an insignificant biological blip in the development of our solar system and the universe
Speaking of the marine ecosystem...read this article from last week "Oceans Fish Could Disappear in 40 Years: UN"... http://news.yahoo.com/s/afp/20100517/sc_afp/speciesfishunus_20100517170048
And if that doesn't depress you enough, listen to this TED lecture from this month by a leading coral reef ecologist -- http://www.ted.com/talks/lang/eng/jeremy_jackson.html Very sobering.