Earth population 'exceeds limits'

Uh, this is a no-brainer. What are we at now, 6 billion people on this planet? We're worse than cockroaches in so many ways.

http://www.earthportal.org/news/?p=2333
http://news.bbc.co.uk/2/hi/science/nature/7974995.stm

Again I'm reminded of this picture: