Obama warns of climate change threat to public health

Climate change poses a threat to the health of all Americans, President Barack Obama said on 7 April, citing the dangers posed by deteriorating air quality associated with higher temperatures, more extreme weather, and the spread of insect-borne diseases that previously have been confined to nations further south. “All of our families are going to be vulnerable. You can’t cordon yourself off from air or from the climate,” the president said.

Obama made …