Global warming or not, the overall message of the article is sound. Though I tend to agree with the scientific evidence that supports global warming, I'm still somewhat on the fence about that. I might be convinced after a few more C5 Hurricanes and maybe a runaway polar ice cap or two.
Two other points though.
1. It does seem certain that clearing out the wetlands and building levees to make way for urban development contributed significantly to the impact Katrina had on the region. Not to mention the fact that this development took place below sea level!
2. Most of the hardest hit victims were poor people.
OK so what? Well, this is where the Bible comes in, if you believe in the Bible that is. It says that we are supposed to, among other things, care for the poor and be good stewards of the Earth (whether global warming is true or not). And it seems obvious that we as a people, government, or whatever haven't done enough to protect what God has asked us to. And if you don't believe in the Bible it should still be obvious that many people on many levels really screwed some things up.