He first suggested creating an intolerance or allergy to meat by tinkering with the human body to induce an unpleasant reaction to meat proteins.

Liao also pitched the idea of reducing the size of humans by 15 centimeters (six inches) saying, "If we are smaller, just by 15 centimeters, I did the math — that is mass reduction of 25%, which is huge. And 100 years ago we're all on average smaller, exactly about 15 centimeters smaller. So think of the lifetime greenhouse gas emissions if we had smaller children."