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Research. And your hint was helpful. (And glad you get my sense of humor)
Hope you don't have the type of winter we did. The skeptics are ostriches jmho (with no offense to what I assume is your national bird) - their heads are in the sand.
Too much data supports climate change science. In fact I believe these horrid winters ARE a result of overall global warming- what happens if you pour a cup of hot coffee into a glass of ice? Ya got iced coffee. Same thing happens with icebergs calving and melting into the sea. And the cooler ocean cools the air above it. Some scientists even have predicted an ice age as a result of this phenomena . No -we need to accept that two hundred years of us humans dumping toxins of one sort or another in the air, earth and seas is affecting this beautiful gift of the planet we call home. And we need to get ourselves on board for a different way of using energy- wind, solar, etc.