They're good points if they're true and support how you feel on the issue.
The earth and the things living on it change, always have, always will. The whole global warming thing and what's causing it has become so political, I don't believe anybody anymore.
But one thing I do believe, we're polluting this planet at a prodigious rate, and even if science, and it's mother necessity, allow us to survive, it won't be a nice place to live. I live in a rather unique spot in the burbs, that while close to the sprawl, seems almost country. But when I travel a couple miles into Chester or Philly, the blight and trash make me sure I wouldn't enjoy living that way. I find it easy to imagine that blight and trash spreading like a fungus over the entire country.
Yeah I've driven cross country many times, and in the heartland where when your dog runs away you can still see him two days later, it's hard to imagine my fears becoming reality. Remember we thought the oceans were impregnable 60 years ago, too... and we were wrong.