
Charlton Heston seemed fond of starring in apocalyptic science-fiction films in the late 1960s and early ’70s. There was 
Planet of the Apes, of course, and 
The Omega Man. But there was also 1973′s
 Soylent Green, a strange detective film (based on Harry Harrison’s 
Make Room! Make Room!) set in 2022 and starring Heston as a Manhattan cop trying to solve a murder in the overpopulated, overheated city.
Source: 
Soylent Green