Oh, you had better hope that we do not run out of oil and gas. Read the Wikipedia article on the Haber process. It makes ammonia, which makes fertilizer, that makes food, that makes people. It uses 3 to 5 percent of all the natural gas produced on the planet, and 1 to 2 percent of all the world's energy. Estimates are we would all have to be farmers, and there is not enough arable land on the plant to feed us without the green revolution (1960 version) and chemical fertilizer. End of the article quote:
Nearly 50% of the nitrogen found in human tissues originated from the Haber–Bosch process.[50] Thus, the Haber process serves as the "detonator of the population explosion", enabling the global population to increase from 1.6 billion in 1900 to 7.7 billion by November 2018.[51]
Yes Virginia, you do eat oil and gas. I love telling people this little known fact. Just imagine going back to farming with a horse and plow (my grandads did this). Plus we used up all the bird and bat guano deposits already. Horizontal drilling and methane hydrates should prevent this for a long time.
