Question

mom project featured an excess of nitrogen that was tossed into the mississippi river by farmers in all states except? missouri mississippi oregon ohio

Explanation:

The question is about which state's farmers did not toss excess nitrogen into the Mississippi River in the MOM project. Oregon is far - west and not part of the Mississippi River basin, while Missouri, Mississippi, and Ohio are all states near or with parts in the Mississippi River system.

Answer:

B. Oregon