the earth’s atmosphere is spiraling toward instability 30 percent responsible for 44% of global carbon emissions 44 per cent most climate-unfriendly of all fossil fuels Center for Climate and Energy Solutions Center for Climate and Energy Solutions 30 percent represents roughly 25 percent the most carbon-intensive fossil fuel, Center for Climate and Energy Solutions 91% of coal consumption in the U.S. a quarter of America’s C02 44 percent of global CO emissions nearly a fifth the most carbon-intensive fossil fuel, represented about a quarter ylittää