Soylent Green

The year is 2022. Overcrowding, pollution, and resource depletion have reduced society's leaders to finding food for the teeming masses. The answer is Soylent Green - an artificial nourishment sold by a major corporation that much of the population are completely dependent on.
When tough homicide detective Frank Thorn is sent to investigate the murder of a member of New York's wealthy elite, he stumbles upon a secret about the Soylent Corporation that threatens to rock the already frail society around him.