Question

What are the biggest energy issues currently faced by humans?

Answer 1

Supply and Demand, as usual.

Explanation:

The "issue" is two-fold. 1. Everyone wants MORE, usually requiring additional energy in both production and consumption. 2. There are MORE of "everyone" (population), so that even a constant individual demand would continue to increase demand.

The supply for the demand has many sources, but the physics of the universe means that any and all energy used creates some form of "pollution" - unusable residue - that will eventually accumulate to the detriment of the population.