“And China, because it represents over half of total global coal production, drives a lot of those numbers,” Broekhoff says. Among fossil fuels, coal is the dirtiest in terms of climate pollution . “The reality is stark,” says Melanie Robinson, global climate director at the World Resources Institute. His administration has proposed a series of policy changes, including repealing climate pollution limits on fossil fuel power plants , reversing a 2009 finding that climate pollution harms people and eliminating climate pollution limits on vehicles . “We saw in 2016 to 2020 that Trump tried to kill climate action and tried to kill the Paris Agreement,” Grant says.