Here's a roundup of the week's top drone news, designed to capture the military, commercial, non-profit, and recreational applications of unmanned aircraft.

According to state-owned media, China is using small drones to battle its disastrous smog problem. These drones assist in two ways. In emergencies, a parachuting drone can spray a catalyst to dissipate thick clouds of smog, as in the image above. Drones can also film the smoke coming out of factory smokestacks; the color of the smoke can reveal illegal pollution.