[leonidasrup]

Much of heating and cooling buildings can be replaced with heat pumps, but many energy uses can't be replaced with heat pumps - high temperature applications, chemical processes driven by heat like cement production.

"The energy devoted to heating and cooling buildings accounts for around 35% of all energy consumption, the largest share attributable to any end use. "

https://www.energy.gov/cmei/buildings/heating-ventilation-ai...

There are electric replacements of fossil fuels for many applications where heat pumps can't by used, but usually they don't use 75% less energy than combustion heating. Usually they use more energy...