1. That California is on the coastline, and is, in fact, a widely populated and polluted place
2. I think that as long as humans dont cause damage to the seashore, populating it is not a bad thing. The problem is that humans will cause damage to the wildlife and environment.
3. New England, The US West Coast, and Most of France's Borders (I say that one because it's probably what they want you to say.)