Quite often this summer, our skies have been filled with smoke from western wildfires. Strong, dominant high pressure has focused record-breaking heat in the west while here across the Midwest, westerly to northwesterly flow has funneled that smoke our direction (See Figure 1 for current active fires, air quality, and smoke plume across the U.S.). Typically, this smoke remains at high altitude, resulting in hazy sunshine. What impact can this filtered sunshine have on crop production?