Alva Review-Courier -

BROOKINGS, S.D. (AP) — A giant brown cloud billowed from the back of a truck as a crowd of onlookers watched, some taking video as it settled into the earth.

Those recently gathered behind caution tape were either curious or prospecting, checking out an equipment demonstration for one of agriculture's fast-rising commodity.

A group of young friends from Iowa were so excited about the business potential of manure they were talking over each other, as if trying to share a secret the world was ignoring. The general public, for some reason, treats manure like waste.

Animal poop, yes. But not waste...