MILWAUKEE -- Maybe growing up, or still to this day, you wondered how we get rain. We all take this process for granted, and it happens constantly in our atmosphere. It all starts with tiny particles ...

Rain may cause some allergies to flare up. Rain may also help ease tree pollen allergies but may worsen grass, weed, dust, and mold allergies. Rain can wash away tree pollen, making the particles ...

Hoof it through the national parks of the western United States—Joshua Tree, the Grand Canyon, Bryce Canyon—and breathe deep the pristine air. These are unspoiled lands, collectively a great American ...

Clouds form upon existing particles in the atmosphere and extreme weather events like flooding and snowstorms are related to production of large amounts of ice in clouds. Biological particles like ...

During the last several weeks, this column has discussed the impacts of wildfire smoke over Missouri, as well as how air pollution, both natural and manmade, can impact human health. While these ...