We've all heard it before.

The weather gets cold, and the jokes come out. "Whatever happened to global warming?"

Sometimes, though, it's not a joke. Sometimes, it's a sign that the person asking the question doesn't fully grasp the science behind the climate change. They may not realize that one data point – Antarctica's coldest winter on record, for example – isn't enough to invalidate a wider trend.

How do you respond to someone like that? CTV News Science and Technology Spcialist Dan Riskin gives it a try in this week's Riskin Report.

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