A Colorado county has launched a public service campaign to warn residents that there may be risks associated with using cannabis. The campaign, dubbed “Marijuana is Not Harmless,” was kicked off by the Weld County Health and Environment Department on Thursday.

Eric Aakko, a spokesman for the department, said that local officials want the public to realize that the legalization of marijuana does not imply that that cannabis use is risk-free. Colorado legalized the recreational use of cannabis for adults in 2014.

“We decided we need to do something to create some awareness that it’s not harmless,” Aakko told local media. “We’re not hearing a lot of the downside of marijuana, it’s not a really strong message that’s out there.”

Aakko said that department officials are especially concerned about people driving while high.

“We’re looking at a report that says every three days a Coloradan dies in a marijuana-related traffic crash,” he said. “That’s the Rocky Mountain High Intensity Drug Trafficking Area report. We know traffic crashes are a problem in Weld County, where we’ve got 4,000 square miles and thousands and thousands of miles of roads. We wanted to get the message out there because if you are using marijuana, the worst thing that you can do is drive.”

Billboards and Online Ads

The “Marijuana Is Not Harmless” campaign includes billboards along county roads and online advertisements. The cost of the public awareness campaign is completely funded by grants, Aakko said.

County health officials have been compiling data to help them determine the health effects of several factors, including cannabis use.

“We do look every three years at a community health assessment — this year we mailed it

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