This image and description from NASA's Atmospheric Infrared Sounder (AIRS), which is aboard the Aqua satellite, shows captured carbon monoxide plumes coming from California wildfires over a three-day period from Sept. 12 to 14, 2020. The image shows three-day averages of carbon monoxide concentrations around 3 miles (5 kilometers) up in the atmosphere. The red and orange areas indicate regions with extremely high carbon monoxide concentrations of greater than 350 parts per billion by volume (ppbv). The more normal, background concentrations of carbon monoxide show up as yellow and green, with amounts between 30 and 50 ppbv. (NASA/AIRS via AP)