Former Vice President Al Gore called on the world to “say goodbye to coal, oil and gas” to fight climate change in a video released Friday ahead of the upcoming UN COP 26 global warming conference.

Oil, gas and coal are the source of 79% of U.S. energy consumption, according to the latest data from the U.S. Energy Information Administration. Nuclear energy provides 9% of U.S. energy, while renewable energy accounts for 12%.

Gore called on public and private sector leaders to “get real” about immediately reducing greenhouse gas emissions and about moving away from fossil fuels to “clean” energy.