565 Gigatons

I just read this article for one of my classes.
It's called "Global Warming's Terrifying New Math," by McKibben. If you can find it, I recommend you read it.
There was one rather terrifying thing he talked about in it.
Basically, that atmosphere can only take about 565 more gigatons of carbon before it starts going into irreversible feedback loops that mess up climate.
The problem is that oil companies have almost five times that much that they are able to extract and sell.
These companies have a lot of power.
And that oil is worth a helluva lot of money.
How do you stop them from selling over 2,000 gigatons worth of carbon?

Fact of the day: It takes 75 gallons of oil to raise a steer to slaughter.