That's not quite right: 20% of our energy supply comes from electricity. But over 50% of the energy we consume gets wasted as heat, and fossil fuel energy wa

That's not quite right: 20% of our energy supply comes from electricity. But over 50% of the energy we consume gets wasted as heat, and fossil fuel energy wastes a lot more of its energy as heat. So the real number is closer to 40%. If we switch ground transport to EV's and heating to heat pumps we can get up to ~75%.