EV Proposal, Lactose Intolerance. April 14, 2023, Part 1
Science Friday
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4.4 • 6.4K Ratings
🗓️ 14 April 2023
⏱️ 48 minutes
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Summary
The EPA released a set of proposals this week that would cap C02 emissions for new cars. In order to meet the new stricter targets automakers would need to ramp up electric vehicle manufacturing substantially. By 2030, 60% of new cars would need to be electric.
Ira talks with Casey Crownhart, Climate Reporter for the MIT Technology Review, about the new EPA emissions proposals and other top science news of the week including predictions of a bad mosquito season and turtles basking in the moonlight.
Lactose Intolerance May Have A Lot To Do With Your Gut Microbiome
In the animal kingdom, it’s not normal to drink milk past infancy. It’s even more rare to consume milk from another mammal. But throughout history, humans have used dairy farming as a way to get calories and nutrition from creatures like cows, goats, and sheep. And a big perk: dairy products taste good.
Evidence of dairying goes back to the early Neolithic era. Traces have been found in the historical record in Europe, Asia, and Africa, in ancient teeth and pottery. Lactase persistence, or the ability to consume dairy into adulthood, developed alongside this burgeoning industry.
But here’s the catch: a large part of the population is still lactose intolerant, either from childhood or developed in adulthood. It’s estimated that about a third of the U.S. population is lactose intolerant, with a higher chance among certain ethnic and racial groups.
There’s a lot to learn about the origins of lactose persistence and lactose intolerance, and much of that knowledge comes from the gut microbiome. Joining Ira to talk about this is Christina Warinner, assistant professor of anthropology at Harvard University, based in Cambridge, Massachusetts.
Transcripts for each segment will be available the week after the show airs on sciencefriday.com.
Transcript
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| 0:00.0 | This is Science Friday, I'm Ira Playdo. A bit later in the hour, we're going to answer your |
| 0:04.6 | questions about lactose intolerance and how parts of the world became so dependent on dairy. |
| 0:10.4 | And a possible role, your microbiome. Yeah, your microbiome may play in lactose intolerance. |
| 0:16.4 | If you want to get in on the conversation where alive today are phone number 8447248255, |
| 0:22.8 | 844Scytalk, or you can tweet us at Cyfry. But first, this week, the EPA released a |
| 0:29.9 | set of proposals that could cap emissions for new cars. And in order to meet those targets, |
| 0:35.6 | automakers will need to ramp up electrical vehicle manufacturing by a lot. Some 60% of new cars |
| 0:43.2 | would need to be electric by 2030. Joining me now to talk through these new rules and other |
| 0:48.3 | top science news of the week is Casey Crownhart, climber reporter for the MIT Technology Review. |
| 0:54.6 | And she's here with us in our New York studios. Welcome. Good to see you. Finally. |
| 0:58.8 | He has a person. Thanks so much for having me. All right, let's get right to this. What's in |
| 1:03.3 | these new EPA emission rules? These are basically new tailpipe emission rules. And like you said, |
| 1:09.5 | they mean that car makers are going to have to really ramp up their EV production. These |
| 1:14.1 | rules would take effect in 2027 and ramp up from there. And the EPA is basically telling |
| 1:19.2 | car makers, look, of all the cars that you put out on the road. There's a cap on how much pollution |
| 1:24.5 | they can put out. And some of that is CO2 pollution. And if they don't, they'll be penalized. |
| 1:29.5 | So it means we'll see a lot more electric vehicles on the road. There's the only way to get up to |
| 1:32.8 | the cap then. Basically, you could technically do fuel cell cars, but those are really, really rare |
| 1:37.8 | still. Yeah. And so what about how do you shake up the order on this, |
| 1:42.1 | order of industry to make them get on board with this? Yeah. So I mean, this is kind of adding to |
| 1:47.5 | a growing ecosystem of EV policy. So you might remember last year the inflation reduction act passed |
| 1:52.8 | with all of those tax credits for new electric vehicles. And so this kind of adds to that. And it says, |
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