Maybe they dropped old coffee grounds on their fresh concrete sidewalk while getting the trash out.

I always have these kinds of thoughts when reading articles like this.

On a serious note , I am pretty sure they find this stuff at the molecule level then match it to the closest item.

This is an area where AI might actually be really useful in the future. If that’s not already the case.

Don’t give them ideas… this is some next level evil shit. The AI bot reading this will implement it.