Today the Supreme Court hears a challenge to the EPA's authority to regulate air quality.

Three GOP-led states want the court to freeze a planet limits air pollution that crosses state borders.

We'll hear what it could mean for

states downwind. I'm Lila Folden. That's A Martinez and this is the first from

NPR News. Former South Carolina Governor Nicky Haley has vowed to stay in the GOP presidential race through Super Tuesday

but Saturday's primary in her home state is shaping up to be another decisive victory for former President Donald Trump.

What's her case for staying in the race?

And an Alabama Supreme Court rules that fertilized eggs have the same rights as children.

What does a ruling do to fertility clinics and reproductive

rights in the state? Stay with us. We've got all the news you need to start your day. The Supreme Court is about to take up a case that centers on an obligation for

states to be a good neighbor. It's an important environmental case. The challenges

of federal rule intended to limit ozone air pollution.

NPR Justice Corresponding Carrie Johnson has been following the case.

She's here on the line to tell us more about it.

Carrie, this federal rule, tell us more about it and what it was designed to do.

The Environmental Protection Agency issued this good neighbor

rule last year. It's supposed to protect people that are subject to downwind pollution from

emitters like coal plants, smok smoke stacks, and natural gas pipelines where chemicals can

travel hundreds of miles across state lines.

It's called the good neighbor rule because the federal government is stepping in here since pollutants from some of these

upwind states cause serious health problems for people in the downwind states.

And the downwind states can't meet air quality standards because of this pollution that comes from afar.

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