Today is an "orange alert" day in Washington, DC. That means air pollution levels are high enough to be unhealthy for people with asthma and other sensitivities. In New Mexico, ash and smoke from the wildfires in Arizona are making the air similarly harmful for certain people. With all of that happening, it's fitting that today I had the opportunity to co-chair a hearing with Sen. Tom Carper (D-DE) on the effects of air pollution on a particularly sensitive group of people — children. Children are much more susceptible to air pollution and more likely to develop health problems — including...