Kirstie Marone

And a few days later, it was noticeably quieter than usual.

I met Abde Desani there.

He's a Somali-American business owner and also a Democratic candidate for the Minnesota legislature.

And we're also seeing some businesses adapting the way they operate.

So at one restaurant in Minneapolis, the blinds are now drawn and the front door is locked, and a volunteer sits inside to open it for customers.

The study aims to provide clues about how the human-made chemicals known as PFAS move through the air and end up in lakes, rivers, and fish.

Summer Streets is a research scientist with the Minnesota Pollution Control Agency.

She recruited volunteers to collect pine needles to test for PFAS.

Street says researchers will look for PFAS hotspots that can be traced back to a single source.

For NPR News, I'm Kirstie Marone in Buffalo, Minnesota.

It's NPR.