If you search “swirling donuts of pollution”, you’ll see that it was used elsewhere referencing the Post article. There are also links to the Post article refer

If you search “swirling donuts of pollution”, you’ll see that it was used elsewhere referencing the Post article. There are also links to the Post article referencing that headline. It’s not unusual for online news sources to test engagement with multiple headlines for an article. Though, the “donuts of pollution” headline is admittedly quite ridiculous.