In this April 4, 2017 photo, Natalie Sua helps two of her children, Javier, left, and Ezekiel who suffer with asthma, do their homework at their home in Fresno, Calif. Both sons use inhalers to combat asthma, made worse by air pollution in the San Joaquin Valley. On the worst days, Sua keeps her children inside, when they would rather be rough-housing on their backyard trampoline, but the risks are too high. Hundreds of people each year in the San Joaquin Valley die premature deaths from poor air quality. (AP Photo/Scott Smith)
Featured Photo Galleries
