Cheaper, and insufficient. We've got less than 30 years to reduce our emissions to zero. Replace a little more than 3% of fossil plants annually and you decarbo

Cheaper, and insufficient. We've got less than 30 years to reduce our emissions to zero. Replace a little more than 3% of fossil plants annually and you decarbonize the grid in that time, but there's also transportation. You'll need way more electricity for electric cars, and then there's ships and airplanes, for which we'll need some kind of carbon-neutral liquid fuel. We have to replace all the steel plants, and figure out some kind of carbon-neutral cement, and somehow stop all the emissions from agriculture, and do something about all the high-temperature industrial processes that burn their own fossil. Meanwhile, our energy usage is increasing by a couple percent a year, which is why with all the wind/solar/storage we've built so far, we haven't made a dent in decreasing emissions.