> what percentage of planetary warming is due to direct heating from energy consumption, vs. greenhouse gas effects vs. natural causes
Humans produce 20 TW of power [1]. (15 if we remove solar, wind and hydro.) The Sun delivers, to the Earth, 44,000 TW [2].
So raising the amount of the Sun's energy the earth retains by 454 parts in a million (329 if we remove solar, wind and hydro) adds to the Earth the energy of our entire civilisation. That is why emissions are the problem. Not our direct heat production.
Humans produce 20 TW of power [1]. (15 if we remove solar, wind and hydro.) The Sun delivers, to the Earth, 44,000 TW [2].
So raising the amount of the Sun's energy the earth retains by 454 parts in a million (329 if we remove solar, wind and hydro) adds to the Earth the energy of our entire civilisation. That is why emissions are the problem. Not our direct heat production.
[1] https://en.wikipedia.org/wiki/World_energy_supply_and_consum...
[2] https://www.nasa.gov/wp-content/uploads/2015/03/135642main_b...