Charlotte McDonald

Friend of the programme, Mike Wendling, sent us this story.

If you've seen a number in the news you think we should take a look at, email moreorless at bbc.co.uk.

Until next week, goodbye.

Hello, and thanks for downloading the More or Less podcast.

We're the programme that looks at the numbers in the news, and in life, and in the sky.

I'm Charlotte MacDonald.

If there's one thing Donald Trump definitely doesn't like, it's wind turbines.

Or windmills, as he calls them.

It's been suggested that Trump's dislike of windmills goes back to a golfing dispute.

In the early 2010s, a brave soul proposed building a wind farm off the coast of a golf course he owns in Scotland.

Trump fought back, labelling the wind turbines monsters and even testifying against the plan to the Scottish Parliament.

But it's the cost to bird life that now seems his main concern.

Earlier this year, he posted on Truth Social claiming wind turbines were killing birds by the millions.

But is he right?

Do wind turbines kill millions of birds a year?

This is Dr Hannah Ritchie, Deputy Editor at Our World in Data and Senior Researcher at the University of Oxford.

OK, let's get into the details of this number.

And let's start with the basics.

We're going to focus on the United States because that's what Trump's comments were referring to.

And it's where we have reasonable data.