We are nasty.
Just a quick badly written post that I found interesting :3
Ever hear of the "big 5" Mass Extinction events? well we are the 6th. Genetic diversity is and is continuing to drop dramatically since we started becoming civilized.
http://en.wikipedia.org/wiki/Quaternary_extinction_event
http://en.wikipedia.org/wiki/Extinction_event
http://en.wikipedia.org/wiki/Megafauna
And look up "hyper disease"
Don't let Wiki be your only scource, It's actually quite interesting to look up. It makes me think that some day the only animals that will be around will be the ones we infused into our civilization. I could see most things being processed or extinct :3
If there was ever a sign of our existence being simply BAD this is it.
Supposedly in the next 30 years the earth will lose 1/5 of it's current biodiversity.