This episode is presented by eBay.

Rob, everyone loves a deal and a bargain from time to time, don't they? Absolutely, mate. And you know where you can grab a great deal? Talk to me. Where? The eBay app. Yes, you are correct. You didn't need to talk to me. I already knew it. I love eBay. When you're buying, you can discover loads of hidden gems. there's so many items where you think I would have never found that anywhere else.

Then when you're buying, you can discover loads of hidden gems. There's so many items where you think I would have never found that anywhere else. Then when you're selling, it's so simple and most

importantly, free. It's free, Rob. When it's this easy to sell for free and there's great deals

on things you love. You can't help but say when it's eBay. It excludes vehicles and business

sellers.

Welcome to Scientific American Science Talk posted on November 21st, 2019. I'm Steve Murseky.

Here's the beginning of a New York Times story from October 24th. New data reveal that damaging air pollution has increased nationally since 2016,

reversing a decades-long trend toward cleaner air.

And here's a line from a BBC story dated November 4th.

An Indian health ministry official said Delhi's pollution monitors did not have enough digits to accurately record

pollution levels, which she called a disaster. Air pollution kills seven million people globally

every year. It is not just causing asthma attacks, but, you know, heart attacks, strokes,

premature birth. That's journalist and author Beth Gardner, heart attacks, strokes, premature birth.

That's journalist and author Beth Gardner, and her new book is Choked, Life and Breath

in the Age of Air Pollution. I recently called her at her home in London. After my 30-minute

conversation with Gardner, stay tuned for a five-minute segment sponsored by the Cavley Prize

with CRISPR gene editing

pioneer Jennifer Dowdner. And now, Beth Gardner. So when I got your book, I saw that it was

about air pollution and my initial reaction was, that's an, you know, that's an old story. I've been alive long enough. I remember the

Clean Air Act and how the Los Angeles Air was a joke on Johnny Carson every night. And I

thought with climate change as the big environmental story, what's the big deal about air pollution

...