CHINA’S SMOG PROBLEM HAS GOTTEN particularly atrocious this year. They had their first ever “red alert” for smog in Beijing December, precipitating the closure of schools and the shut-down of construction sites. Beijing residents even started buying bottled fresh air from Canada. Chinese government officials are grappling with different ways to deal with the growing smog, and one of the solutions is particularly novel:

Giant water cannons. Quartz reports that the giant water cannons have been adapted from a similar technique used for dust control at mining sites. The water captures and brings down some of the larger smog particulates, which cleans the air somewhat. It is not effective, however, in taking out the smallest smog particles, which are among the most damaging to human health.