[strictnein]

The runoff from farms in rural Minnesota is being dumped into the sea? There's almost no place farther from the sea in North America than upper midwest rural farms.

[epistasis]

It causes massive algeal growths in the Gulf of Mexico. This sucks massive amounts of oxygen out of the water leading to so-called "dead zones".

[anyonecancode]

It runs into the Mississippi river, which runs into the sea.

[strictnein]

Sure, some small amount of it may go down the 2000+ mile trek from rural MN to the gulf, but that's not what anyone imagines when someone uses the term "dumped into the sea".