>"Private pools may no longer be heated with gas and electricity, except for rehab centers, recreational facilities, and hotels. The new regulations will initially apply until the end of February."
I'm not sure how common private pools are in Germany, but I'm just curious how one could heat the pool without gas neither electricity. Is there some other option? Obviously, the sun will heat it in summer, and aside from that? I've never owned a home with a pool, and they seem quite wasteful, but if I had a private pool, how does the government get me to stop heating it?