This is just a goofy article from Syfy looking at the real world "realities" of the classic science fiction film from like the 70s named "Soylent Green" where the twist is that everyone is eating people. They do this at times, look at movies and what the movie implies, what's the actual science about it all, and have a bit of a laugh at how unrealistic sci-fi movies can be. Y'all are getting worked up about a goof article about an old sci-fi movie. They aren't implying that eating humans is an actual solution or even a decent idea. They aren't actually advertising cannibalism, and they make these wild article titles to get people to click and consume their media and get people talking about it, like y'all are doing right now. So seems that it worked.