> First of all, human power releases tons of carbon dioxide just like burning fossil fuels does I was disappointed that for all its calculations, the article c

> First of all, human power releases tons of carbon dioxide just like burning fossil fuels does I was disappointed that for all its calculations, the article completely avoided the question of "How green is human power?" Instead, it just repeated "could become one of the cleanest energy forms available". But they had to, of course - answering that would have destroyed the entire idea. Fueling humans burns a huge amount of carbon, and neither the food > muscle conversion or the muscle > electricity conversion is even passably efficient.