habitat loss, local pollution, overhunting or any other 
  myriad of ways that humans wipe out species.

Why not? I was challenging your statement:

  Why is it bad to be disconnected from nature? What's wrong 
  with going in the opposite direction towards increased 
  artificiality, given that our very artificial 
  infrastructure keeps us alive?

Bleaching of the Great Barrier Reef. http://en.wikipedia.org/wiki/Environmental_threats_to_the_Gr... is an example of destruction of environment around us as we keep doing what we're doing.

I don't feel the need to count the species that became extinct due to habitat loss, local pollution, overhunting or any other myriad of ways that humans wipe out species.

Keep doing what we're doing and we will screw ourselves, global warming or not.