The big one is that we need to decarbonize building heating and cooling as soon as we possibly can (like, by 2030) in order to avoid disastrous climate scenario

The big one is that we need to decarbonize building heating and cooling as soon as we possibly can (like, by 2030) in order to avoid disastrous climate scenarios. Heat pumps run off electricity, which is starting to be decarbonized rapidly, and heat pumps are also battle-tested solutions that many countries already use so they are the main technology to get off coal, oil, gas, etc for cooling and heating. Last year, the US passed the Inflation Reduction Act which created a ton of consumer and industry incentives to manufacture and deploy heat pumps, which created a lot of interest. Additionally, Russia's war in Ukraine made it clear to many countries that they didn't want their energy security dependent on an aggressive nation, so lots of European nations rallied to install heat pumps amid a possible gas shortage from Russia. One cool thing about heat pumps is that they run more than 100% efficient. This is because they move energy around instead of generating it. Working in good conditions, most units these days will run around 300% efficient. It really depends on your specific home, electricity prices, region, etc whether this efficiency results in savings on bills, though. Many older generation heat pumps didn't work as well in colder climates, but now that's not as much of an issue. I believe I saw that one of the US states with the fastest recent heat pump adoption is Maine, and Norway has a very high heat pump adoption as well.