@browncoat - There are many endangered ecosystems of the world that are on the verge of collapse. Nearly every major river in the world is extremely polluted to the point where very little can live in them. That's the reason we are running out of river dolphins and manatees
I do think, however, that people are getting better at addressing these problems. And the wonderful thing is that once an ecosystem is given a chance to recover, it usually does with a vengeance.