Scientists have found a new threat to the planet: Canadian beer drinkers.

The government-commissioned study says the old, inefficient "beer fridges" that one in three Canadian households use to store their Molson and Labatt's contribute significantly to global warming by guzzling gas- and coal-fired electricity.

"People need to understand the impact of their lifestyles," British environmental consultant Joanna Yarrow tells New Scientist magazine. "Clearly the environmental implications of having a frivolous luxury like a beer fridge are not hitting home. This research helps inform people — let's hope it has an effect."

The problem is that the beer fridges are mostly decades-old machines that began their second careers as beverage dispensers when Canadians upgraded to more energy-efficient models to store whatever Canadians eat besides doughnuts and poutine.

University of Alberta researcher Denise Young, who led the study, suggests that provincial authorities hold beer-fridge buy-backs or round-ups to eliminate the threat — methods that Americans use to get guns off the streets.

• Click here for the New Scientist report.