I kinda have theory, that for live enough air and temperature and water... Plants energy taking from sun/light and air and water and heat... So kinda for better grew just need those four elements light, air, watter, heat and this maybe even for humans/animals. Human eating system maybe even is not at all for living and proteins etc, but for taking water for stabilizing energy entropy inside organizm... So for human just also need: air, heat, water... Or maybe another component: kinda spirit, ethanol - alcohol/glucoze like for internal combustion engine...