Times Square Gets New Carbon Counter

First off: It shows estimates. Really estimated estimates.

Deutsche Bank switched on its big Carbon Counter billboard outside Madison Square Garden today. It supposedly displays a real-time count of greenhouse gases pumped into the air, some 2 billion metric tons a month, and adds it to the 3.6 trillion tons already up there.

The number is actually the result of a complex formula that converts the output of 20 greenhouse gases onto carbon equivalents.