My most recent email was about how much of an absolute waste of money it would be to install heat pumps everywhere - which is the current plan for "sustainable" home heating in the UK.
Heat pumps are inefficient, loud, noisy and actually use about as much energy, and therefore still cause more pollution if connected to the national grid, which is still about 50% fossil-fuel-based.
A better solution is thermal solar panels and a big hot water tank. Cheaper, reliable and uses *zero electricity*.