For those of you who missed this one, Soylent Green was a 1973 movie by MGM (I grew up down the street from MGM). It starred Charlton Heston, Leigh Taylor-Young, Chuck Connors, Joseph Cotten and Edward G. Robinson. It was an interesting and entertaining movie.

The story line is "In an overpopulated futuristic Earth, a New York police detective finds himself marked for murder by government agents when he gets too close to a bizarre state secret involving the origins of a revolutionary and needed new foodstuff called soylent green."

The dark secret is exactly what soylent green is made of.