Washington, D.C. officials have begun to use dry ice as a new method to combat the District’s growing rat population, according to Gerard Brown, the program manager of the D.C. Department of Health’s ...

WASHINGTON -- Any mists spotted rising over the swamp may just be Washington wielding its newest weapon in its never-ending war on rats: dry ice. The District of Columbia's rodent control division ...

Dc Politics D.C. adds dry ice to its rat-fighting war chest. January 3, 2018 More than ... Brown said Washington used dry ice for five months in 2016 before all cities had to stop.