I do agree that to solve all the big environmental problems we're facing, such as climate change, biodiversity loss etc., we're going to have to change the way

I do agree that to solve all the big environmental problems we're facing, such as climate change, biodiversity loss etc., we're going to have to change the way we live. Merely replacing gasoline powered cars with electric cars isn't going to cut it. That being said, while improving energy efficiency is good as it makes the challenge of decarbonization easier, when/if we have low-impact electricity generation we could use (lots of) electricity to decarbonize many processes requiring fossil fuels today. Such as production of ammonia for nitrogen fertilizer (today from natural gas), or building heating with heat pumps instead of fuel burning boilers, steel production with hydrogen direct reduction instead of coke, etc.