What's it going to take?

I mean come on now. What has to happen to chase the global warming denialists back to the 9th circle of hell from which they came?

Would the west erupting in an unprecedented conflagration amid relentless record high temperatures convince people?

How about record lows in the extent and volume of arctic sea ice, year after year?

The ongoing collapse of the ice shelves along the Antarctic peninsula?

The earliest date that four tropical cyclones have formed in the Atlantic since records began, including a hurricane that formed at 40 degrees lattitude in mid-June?

The Midwest swinging wildly between destructive floods and exterminating drought?

What's it gonna take? Maybe we'll find out very soon, but evidently we're going to have to find out the hard way.