Humans are not even good enough to consider/consume for FOOD, I mean even if we consider this option of cannibalism then also it would be bad idea, because I think, with "n" number of diseases and varieties of cancers, STDs and God know how many more diseases yet to reveal their faces. You know, if human is consumed by wild animals then there is a fear of them having diabetes and mental disorder, now that being an animal, imagine this situation for Human consuming humans, some. This idea of fighting climate change with cannibalism will be least feasible and would be non-effective, this will actually trigger a mental disorder across Globe.