Jaxjacky
I’d include rain water harvesting, rain stored in a tank in a basement for later use, adopted in Europe and some parts of the USA.
We had a rainwater harvesting tank sunk underneath our lawn, it stores 1,000’s of litres (sorry forgotten the exact amount) we can also use this water to flush two of our toilets (just manually swop pipe beside the cistern).
We have solar panels, and are looking into storage batteries now they are more efficient and take up less room.
We also have wooden blinds, which keep out the heat and light, in summer and keep in the heat in the winter.