This is becoming a cliché nowadays. It's everywhere. I personally believe that we as humans may have increased a very small percentage of the planet temperature (from a Nova episode i remembered it to be half percent). But what i really hate about this global warming campaign is our pretentious importance over this planet. Instead of saying "Let's save the planet" this campaign should actually change its mission statement first. It should be "Let's save ourselves". Planet has been here billions of years before we got here and it will stay a few more billions after we leave.