New technology has tipping points—defined by functionality, consumer preference, and price. Clean energy is passing a huge one. It is now cheaper, in many parts of the country, to build a brand-new wind farm or solar plant than simply to pay the operating costs of coal, and sometimes even natural gas. That is the kind of tipping point worth paying attention to. There is clean energy, and cash, on the table—let’s use them to accelerate our low-carbon energy transition.