Meet the sargassum belt, a 5,000-mile-long snake of seaweed circling Florida

While visiting the island of St Kitts, I was talking with some locals about the sargassum that was collecting along the shore on the Atlantic side. There was quite a lot of it, and it smelled. 

The questions were: why is so much of it collecting? And does it have anything to do with pollution?

And the answer is that it is likely the result of human habits. Here's an article from 2023 that sums it up pretty well. 

What is sargassum? Here's why seaweed is piling up along Florida beaches : NPR


https://www.npr.org/2023/03/15/1163385168/sargassum-seaweed-florida-mexico-beaches