Does Climate Change Exist? Depends on Your State of Mind

Whether or not you think human activity affects climate changes around the world depends on your political views, at least in the United States. That's the conclusion of a Pew Research study, which found that people who deny there is any human impact on the climate, or that it's even changing, have more in common than just politics. It's the psychology of denial, according to a thesis by Kirsti Jylhä of Sweden's Uppsala University, who has been studying humans'...

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