Feds put freeze on Bostons rat-killing experiment [View all]
Federal officials have put a freeze on Boston’s new tactic of killing rats by using dry ice.
City workers began using the super-cold substance to exterminate rats earlier this year by packing it into rat burrow exits and letting it melt. Dry ice, which is frozen carbon dioxide, reverts to being a gas as it melts, filling the burrows and suffocating any rats inside.
Boston officials said the method is effective, more humane, and significantly cheaper than using rat poison.
“We were using it with great success,” said William Christopher, commissioner of the city’s Inspectional Services Department, adding that the city had not run into any problems during the new campaign. “It’s such an effective process.”
Read more: http://www.bostonglobe.com/metro/2016/12/28/feds-put-freeze-boston-new-rat-killing-experiment/anaCOy3Ehc8JtXZxVRztWL/story.html
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