CNN - The Environmental Protection Agency will propose one of its most anticipated climate rules to date on Thursday, forcing nearly all U.S. power plants that generate the nation's electricity to capture or otherwise reduce emissions of planet-warming fossil fuels. The rules would apply to the nation's fleet of existing and new power plants powered by coal and natural gas — the two main fossil fuels that are at the root of the climate crisis. The Biden administration's proposal would force utilities to equip many power plants with costly carbon capture technology or add clean hydrogen fuel to reduce emissions.