Washington — Since President Trump took office in January, his Environmental Protection Agency has been both slashing and reconsidering dozens of rules designed to fight pollution. The White House is also firing many of the EPA staffers who enforce the rules that remain.

This week, CBS News visited a Houston neighborhood that's near an NRG Energy coal-fired power plant, the largest in Texas.

When CBS News visited the same neighborhood in December, Mr. Trump had just been elected to a second term, promising the energy industry that he would roll back environmental regulations that protect air quality .

"I think of pollution as a silent and invisible killer," Dr. Winston Liaw, chair of the Health Systems and Population Health Sciences Department at the University of Hou

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