This is honestly a personal answer question, but theoretically you could say something along the lines of: I (a) would/ (b) would not support this because it
A. Would allow us to possibly use our own bodies to create renewable energy and our own oxygen, and could allow for larger population if that’s what was needed or wanted and could also help supply more food for the less fortunate.
B. Is unnatural to humans and could cause many health defects as well as affect the way that the Earths cycles already work within the food chain that includes humans.