"You're sneezing your head off, and your eyes sting. The air around you is yellow -- along with your house, your car, your pets. Yes, of course, you already know that allergy season has arrived. Now for more bad news: Climate change makes it much worse.

Nearly 20 million Americans sneeze and sniffle due to pollen and dust, according to the US Centers for Disease Control and Prevention, and many more of us will be BFFs with our tissues in the future.

The number of allergy sufferers has grown, research shows. One in 10 Americans struggled with hay fever in 1970, and 3 in 10 did by 2000. Asthma, which can be made worse by exposure to pollen, has become more common too, with higher rates among kids, low-income households and African Americans."

Jen Christensen reports for CNN April 12, 2019. [2]