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This is Scientific American's 60-second science. I'm Christopher Entagata. Got a minute?

The Paris Climate Agreement pledges to limit global temperature rise to well below 2 degrees Celsius.

But really nobody, and certainly not the United States, has really laid out the plan to get there.

Drew Shindell, a climate scientist at Duke University.

So we wanted to model

what would be the effects of actually putting into place policies that would get us to a level

that we've pledged to reach. Shindell and his colleagues forecast that to stay within two degrees

C, we'd have to electrify nearly every car in the nation, and we'd have to get

more than half our power from renewables. And if we do all that, in addition to keeping warming in

check, the researchers estimate that we'd avoid nearly 300,000 premature deaths due to air pollution

in the U.S. by 2030. And they say the health-related financial

benefits of that clean energy conversion amounting to $250 billion over the next 15 years

would likely outweigh the cost of implementing all that new technology. The analysis appears

in the journal Nature Climate Change. Big caveat. A lot of politicians

these days don't think on 15-year timescales. They're looking only as far as the next election.

Right, but you start putting in these policies, and you know, you see the benefits for public health

the same year the policies start to go into a place.

...