https://www.overclock3d.net/news/software/civilization_vi_s_gathering_storm_expansion_brings_climate_change_to_the_game/1
 
During the game, players will generate carbon by using fossil fuels and by otherwise impacting the game's environment, burning coal during the industrial revolution to the move towards renewable energy sources in the late-game, as each player's reserve of fossil fuels will inevitably run out, and the world's climate will eventually wreak havoc on coastal settlements. With these changes, resource wars will take on a new turn, as players may seek to conquer other nations to plunder their fossil fuel reserves, or conversely, take out the world's greatest polluters to help save their sinking settlements. Might be interesting to see how a player manages resources.

The lunatics are running the asylum. Game content is supposed to be fun. They need to quit painting the whole world in politics. It's cancer.