"SEATTLE - Even as the Trump administration seeks to roll back Obama-era rules to curb greenhouse gas emissions at coal-fired power plants, Washington state is forging ahead with its own rules to cap carbon pollution from big industrial facilities.

But the state faces legal challenges as it begins requiring large polluters to gradually reduce carbon emissions over time to combat climate change.

Four natural gas utilities and eight industry groups are seeking to invalidate Washington's so-called clean air rule, which took effect in January and affects such facilities as power plants, fuel and natural gas distributors, oil refineries and manufacturers."

Phuong Le reports for the Associated Press May 28, 2017. [2]