The pollution limits the EPA is wrongly trying to roll back have never gone into effect. Yet emissions continue to shrink because Americans are demanding cleaner air and cheaper, cleaner energy — and cities, states and businesses are delivering. Wind, solar and other clean energy sources are beating coal in the marketplace, which is benefiting both public health and the economy. That will continue to happen even if the EPA keeps spitting in the wind. Washington ought to lead, follow, or get out of the way.