"[D]ata from the World Meteorological Agency show that, as the U.N. Secretary-General, António Guterres, told the {COP28} global climate talks in Dubai last week, we can safely say, even with weeks to go, that 2023 will take the title {as the world's hottest year on record}. . . . And yet . . . [a]lmost simultaneous with the breakout in temperature, there was a breakout in the installation of renewable energy, especially solar power, around the world. . . . {T}he cost of clean energy has dropped so far that it is now possible that saving the planet might be a corollary of saving cash. This ongoing drop in price is more than a decade old, but sometime in the past few years it crossed an invisible line, making it cheaper than hydrocarbons, and this was the year when that reality finally translated into dramatic action on the ground. . . . There are plenty of other technologies we’re [currently] spending money on, including small nuclear reactors and giant carbon-sucking machines, that may or may not someday play a role in the climate fight, but, for all the furor they produce, they seem unlikely to make much difference anytime soon. In the next few years, while the planet’s climate system teeters on the edge of breaking, it’s sun, wind, and batteries that matter. They’re cheap, and they’re ready."