I enjoyed this article, but disagree with it. For me it comes down to an economic argument, is it cheaper (on a case by case basis) to buy energy or save it? Fo

I enjoyed this article, but disagree with it. For me it comes down to an economic argument, is it cheaper (on a case by case basis) to buy energy or save it? For example, my front door has a huge gap that lets cold air inside in winter. The amount of energy needed to heat my hallway is astronomical, so it's much better to fix the gap. Also, a word on nuclear. People seem to ignore the fact that nuclear is by far the most expensive way to generate electricity. If you want to impoverish your country, build nuclear power stations! It's much cheaper to build renewables and use the surplus electricity to create hydrogen which can be stored indefinitely and then burnt when the wind isn't blowing and the sun isn't shining.