JUDY WOODRUFF:

Now a look at a yet-to-be-released climate change report making headlines for what it tells us about the current state of science and politics.

The New York Times, which acquired a draft of the document, reports today that among its key findings are that evidence for a changing climate abounds, from the top of the atmosphere to the depths of the oceans, and that — quote — "Many lines of evidence demonstrate that human activities, especially emissions of greenhouse or heat-trapping gases, are primarily responsible for recent observed climate change."

The Times also reports that scientists are expressing concerns that the Trump administration has yet to indicate how or whether it will act on the findings.

For more, we turn to New York Times reporter Lisa Friedman, who wrote today's article.

Lisa Friedman, welcome to the NewsHour.

And we should say that, late today, the White House put out a report saying that it didn't understand why the story was necessary, that it hasn't made a decision on the release of this report.

But setting that aside for a moment, who commissioned this report? Where did it come from?