For the first time since Thomas Edison opened the first power station in London in 1882, Great Britain functioned without any coal-fired power plants last Friday. The milestone marks the first continuous 24-hour period without coal since the Industrial Revolution. This isn’t the first time Britain has gone without coal for a significant chunk of the day, but before this, 19 hours was the longest continuous time that coal power was able to go offline. Instead of coal, National Grid relied on a mix of 50.3% gas, 21.2% nuclear, 12.2% wind, 8.3% imports, 6.7% biomass, and 3.6% solar on Friday.