Here are a few ideas:
- With the human population growing in number, what you are left is feeding more people more food but that food mostly reaches those who already have plenty. As there already is medication that makes a person pass his fat as stools, why can’t this be used as a source of oil? At-least this way the fat people will lose weight which they will like and that oil can be used as some source of energy. The world population is about 7 billion of which 65% is overweight or obese, which will be a lot of oil.
- Neutrinos: These are electrically neutral particles origination mostly from the Sun’s nuclear activity. These are so much in plenty that 65 billion pass through an area as big as a man’s thumbnail per second. Since these particles are electrically neutral, they pass greater distances through solid objects. If we could harness this energy then this energy would power the whole world inexhaustibly while still giving us clean energy.
- Thunder and lightning are also huge power sources, why can we use them too or generate environments where we can use them