Heat pumps outperform boilers and furnaces — even in the cold

Whenever Ram Amar explains his idea for mitigating climate change, people usually look at him strangely and ask if he’s crazy. It’s easy to see why.His startup, Rewind, wants to sequester a gigaton of carbon each year — about 10 percent of what climate scientists deem necessary each year to reach net zero by 2050 — in a remarkably simple way. The elevator pitch goes like this: Gather millions of t