— -- New images released by NASA show a dangerous sulfur plume moving across northern Iraq in the wake of the battle to retake Mosul. As the Iraq military announced its operation to capture ...

One of two images released by NASA this week, the first taken on October 22 by its Aqua satellite, shows a giant plume of light-colored smoke billowing from a sulfur fire.

The image shows elevated levels of sulfur dioxide, or SO2, gas over the Eastern United States on Oct. 23, 2013. These low SO2 gas levels originated from an eruption of Kliuchevskoi volcano ...