This is Science Friday. I'm Ira Flato. A bit later in the hour, we're going to talk about the worldwide increase in C-sections.

And if you have this story, you'd like to share with us about your C-section or your partner C-section.

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Give us a call 844-8255, or you can tweet us at Sy Frye. Phone, 844-724-8255,

or tweet at SciFri. But first, last week's report from the Intergovernmental Panel on Climate

Change gave us a sobering look at what a world worn by 2 degrees Celsius might look

like.

Then on the heels of that report, ExxonMobil announced that it was throwing financial support

behind a U.S. carbon tax.

It's a big step for one of the world's largest oil companies, which last year was sued by its own employees

for misleading statements about the environmental and financial impact of fossil fuels and has a

history of denying the climate science is settled. Here with the story as well as other

short subjects in science is Omer Erfan, he's staff writer for Vox. Omer. Welcome back to Science Friday.

Thanks for having me again. So Exxon says it's going to back U.S. carbon tax on the surface. That sounds like a good thing. But what exactly are they proposing?

They're proposing to back a lobbying effort launched by conservative former secretaries of state, George

Schultz, and James Baker. This is a group called the Climate Leadership Council, and it proposes

starting with a $40 per ton price on carbon dioxide emissions, and that price would rise over

time. Then they would use that money to go back to people like you and me, essentially, in the form of a dividend or a rebate, and the estimate is it would start at about $2,000 a year for a family of four.

There is a catch, though, and Exxon wants rollbacks of other environmental regulations.

And one big catch is that they want immunity from climate change related lawsuits that want damages for these companies.

It's the same deal that the gun producers have.

Yeah, pretty much. It's kind of analogous to what they got, and it's what other industries have also tried to get.

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