While I agree that there is a real environmental problem that involves population, she says 'deer almost disappeared' in the US!?!? This is simply not true.

And when a species comes close to extinction but seems to come back, hasn't its own genetic diversity often been reduced to the point that a disease or environmental change that once might have killed many of them would kill them all?

For examples of how supposed solutions such as GMO food production can have very negative impacts, PBS's "Salmon: Running the Gauntlet" is a fantastic look at how a similar practice of farming salmon can have very negative consequences indeed, and can do more harm than good to our natural world, despite our best intentions to reverse the damage we've caused to the environment: http://www.pbs.org/wnet/nature/episodes/salmon-running-the-gauntlet/introduction/6546/

The Palm Oil plantations are responsible for the total degradation of the forests in Indonesia and Sumatra and therefore the killing of virtually all the Orangutans left on the planet.

Another thing cities do is concentrate demand, incl. demand for eco-friendly products. I was once involved in a conference planning session outside a town near Albany, & when our group went shopping (at a large chain supermarket) for supplies, we couldn't find recycled paper towels. This must have an impact on deforestation. It also seems to be easier to find organic food in NYC than in the areas where those crops are actually grown. (The conference was >10 years ago, so maybe things have changed...I hope).

Is all the water on the planet the only water that's ever been here since its creation? Is more water ever created in nature?