Alternative energy sources would allow for sustainability and less pollution on Earth. If we can use solar, wind, hydroelectric, biofuel, etc., then we can actually have a sustainable form of energy. None of these forms of energy require harm to the environment to tap into, unlike oil which requires drilling, and its not in infinite supply. Traditional power plants use either nuclear or wood-pellet energy. With nuclear, the waste left behind is extremely toxic and requires underground storage, and with wood-pellet, an immense amount of carbon is released into the atmosphere. So basically, alternative energy sources would benefit humans greatly by making our energy sustainable and preserving our climate and environment.