From the New York Times, I'm Michael Babaro. This is the Daily.

After rolling back a slew of regulations aimed at reversing climate change and pulling funding for the scientists who monitor it.

The Trump administration is now taking its boldest action yet.

It's eliminated the scientific finding at the heart of the government's ability

to fight climate change in the first place.

Today, my colleague Lisa Friedman

on the history of that finding,

what it did, and what happens once it's gone.

It's Thursday, July 31st.

Well, thank you to Aaron.

It's great to be here with all of you for what is a very big deal.

It's a very big announcement.

If finalized, today's announcement would amount to the largest deregulatory action in the history of the United States.

Lisa, just to start, I wonder if you can set the scene for us of this news conference that occurred just a couple of days ago.

Sure.

On Tuesday, Lee Zeldin, the EPA administrator, traveled to Indianapolis to a truck dealership to make what he called one of the most significant acts of deregulation in American history.

Hmm.

And what this was was the beginning of a plan to roll back something called the endangerment finding.

And that finding...

Which I have to confess, I've never heard of.

Many people haven't, but the endangerment finding is the legal and scientific basis for regulating

greenhouse gases in the United States, from automobiles, from power plants, from oil and gas

...