Watch Us Do This Really Simple Science Experiment That Proves Donald Trump Wrong

And almost screw it up.


Climate change can be a hard thing to wrap your head around. It’s really scary! The Earth is really complicated! There are a lot of numbers!

But if you want to know whether global warming is real, there’s really only one thing you need to know: Does carbon dioxide trap heat in the atmosphere? Scientists have known the answer (yes) since at least 1895, when the Swedish chemist Svante Arrhenius did the first research on what came to be know as greenhouse gases. Some climate change questions are hard, like how to predict the movement of clouds in computer models. But the basic existence of the greenhouse effect is very straightforward and noncontroversial. Among scientists, that is. Donald Trump and some other prominent Republican politicians are still struggling.

In fact, the greenhouse effect is so basic that you can even prove its existence with a simple DIY experiment. We got the idea from the great science communicator Bill Nye, who talked about it when he appeared on a recent episode of our Inquiring Minds podcast. We decided to give it a try, and it worked…barely. We’re not scientists, okay?

More MotherJones reporting on Climate Desk

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Thank you!

We didn't know what to expect when we told you we needed to raise $400,000 before our fiscal year closed on June 30, and we're thrilled to report that our incredible community of readers contributed some $415,000 to help us keep charging as hard as we can during this crazy year.

You just sent an incredible message: that quality journalism doesn't have to answer to advertisers, billionaires, or hedge funds; that newsrooms can eke out an existence thanks primarily to the generosity of its readers. That's so powerful. Especially during what's been called a "media extinction event" when those looking to make a profit from the news pull back, the Mother Jones community steps in.

The months and years ahead won't be easy. Far from it. But there's no one we'd rather face the big challenges with than you, our committed and passionate readers, and our team of fearless reporters who show up every day.

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