The last great days

Bill McKibben says it’s worse than we thought just last week or so.

Scientists say that to have even a two-thirds chance of staying below a global increase of two degrees Celsius, we can release 800 gigatons more CO2 into the atmosphere. But the Rystad data shows coal mines and oil and gas wells currently in operation worldwide contain 942 gigatons worth of CO2. So the math problem is simple, and it goes like this:

942 > 800

“What we found is that if you burn up all the carbon that’s in the currently operating fields and mines, you’re already above two degrees,” says Stephen Kretzmann, OCI’s executive director.

And two degrees is no longer the red line anyway.

Two degrees Celsius used to be the red line. But scientists now believe the upper limit is much lower. We’ve already raised the world’s temperature by one degree—enough to melt almost half the ice in the Arctic, kill off huge swaths of the world’s coral, and unleash lethal floods and drought. July and August tied for the hottest months ever recorded on our planet, and scientists think they were almost certainly the hottest in the history of human civilization.

In some places it approached too hot for humans to survive.

So last year, when the world’s leaders met in Paris, they set a new number: Every effort, they said, would be made to keep the global temperature rise to less than 1.5 degrees. And to have even a 50–50 chance of meeting that goal, we can only release about 353 gigatons more CO2. So let’s do the math again:

942 > 353

A lot greater. To have just a break-even chance of meeting that 1.5 degree goal we solemnly set in Paris, we’ll need to close all of the coal mines and some of the oil and gas fields we’re currently operating long before they’re exhausted.

And…it won’t happen.

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