Who said they weren't? And what are you planning to do about it? Since this is such an urgent , imminent threat, would you ban all cars? Are you going to stop driving your car?
Let me guess, your solution involves letting people continue to drive cars but making them hand over some more money to the government. Ya know, for the planet and all.
And it will still be fine for Obama, Gore, Leonardo, the the rest of the SJW AGW entourage to fly around the planet consuming jet fuel by the tens of thousands of gallons to preach the message. It will be fine for them to live in homes that consume more energy than 50 American homes combined. It will be fine for the US to pay carbon taxes that will obliterate our economy while allowing China and India et al not to participate.
Brilliant.