The last time the UK emitted less carbon dioxide than it did in 2016, most Brits were still traveling by horse and carriage. Carbon emissions in 2016 fell by 5.8 percent compared with 2015, and the use of coal fell by a record 52 percent over the same period. The U.K. also generated more power from wind than coal for the first time ever last year. The country plans to shut its last coal power plant by 2025.