Pollution from fires, intensified by rising temperatures, is on track to become one of America’s deadliest climate disasters.

© The New York Times

The decision came despite an effort by a former industry lawyer who is now at the E.P.A. to reverse the regulation.

© Ben Mckeown/Associated Press

Readers respond to a guest essay about throwaway plastic. Also: President Trump the divider; stealth legislation.

We’ll never know with certainty that carcinogens in the smoke, dust and ash from the World Trade Center caused my wife’s cancer and my own.

There is a growing mountain of imperfect but troubling evidence that pesticides and other chemicals may be behind the exploding rates of the disease.

The dupes of the cute-ugly toys have left consumer complaints and warnings about safety risks and potentially hazardous chemicals in their wake.

The kindergarten’s cooks used inedible pigments to decorate buns and cakes, the authorities said. Eight school officials and employees were detained.