In dense urban areas, in suitably insulated buildings, heat can be provided by the activities of ordinary life.
Cooling can be provided from intermittent power sources like wind and solar. Ice is amazing stuff. Make ice in the day when the hot sun is shining or anytime the wind is blowing, then melt the ice to cool and dehumidify your bedroom at night.
I happen to live in a mild climate where heating or cooling is generally considered a luxury. Plenty of people in our city do not heat or cool their homes. My parents and one of my siblings live in a similar places. Nobody has air conditioning and if the heat goes out it's not deadly, at most uncomfortable, and the pipes don't freeze.
Creating such an environment in urban places, anywhere on earth, is not an impossible task, even without the use of fossil fuels.
There are incredibly diverse and healthy cuisines worldwide that do not require grocery stores with refrigerators or freezers.
I live in a fairly dense suburban environment. My wife and I do not commute, we've been very fortunate and have avoided that lifestyle since the mid-'eighties. We have a compost heap and are mostly vegetarian. What leftovers the dogs won't eat, the compost heap will.
No, I have not convinced my wife to get rid of our refrigerator, but as a kid and young adult I've lived and prospered without one.
We could purchase solar panels to support a refrigerator, but our local power source is inexpensive and fairly benign compared to the rest of the U.S.A., about 40% renewable, 20% nuclear, 25% gas, and the rest untraceable via "free market" skulduggery.
"Trucked in" could be as well done on electric rail, with electric delivery trucks, the electricity coming from entirely renewable sources.
Fresh greens can be grown anywhere there is sunlight, even in dense urban environments.
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