There are heavy subsidies to fossil fuel (4.7 trillons a year globally says the IMF)... Mostly negative externalities. Carbon tax can be seen as a tax... or as

There are heavy subsidies to fossil fuel (4.7 trillons a year globally says the IMF)... Mostly negative externalities. Carbon tax can be seen as a tax... or as the end of a subsidy, allowing to get the most efficient solutions for the people