"Federal regulators said they plan to close part of a New Mexico coal-fired power plant, a day after the Supreme Court ruled that pollution that crosses borders contributes to unhealthy air in neighboring states.
Critics have long complained that the San Juan Generating Station and other coal-fired plants in the Four Corners region — where New Mexico, Colorado, Arizona and Utah meet — have worsened air quality and visibility at national parks in the area.
The Environmental Protection Agency has proposed approving a plan negotiated by the agency, Republican Gov. Susana Martinez’s administration and the state's largest electric provider, PNM. Wednesday's announcement kicks off a 30-day public comment period."