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Climate 101

Welcome to Climate 101

Your guide to the key technologies of the energy transition.

Welcome to Climate 101
Heatmap illustration/Getty images

Here at Heatmap, we write a lot about decarbonization — that is, the process of transitioning the global economy away from fossil fuels and toward long-term sustainable technologies for generating energy. What we don’t usually write about is what those technologies actually do. Sure, solar panels convert energy from the sun into electricity — but how, exactly? Why do wind turbines have to be that tall? What’s the difference between carbon capture, carbon offsets, and carbon removal, and why does it matter?

So today, we’re bringing you Climate 101, a primer on some of the key technologies of the energy transition. In this series, we’ll cover everything from what makes silicon a perfect material for solar panels (and computer chips), to what’s going on inside a lithium-ion battery, to the difference between advanced and enhanced geothermal.

There’s something here for everyone, whether you’re already an industry expert or merely climate curious. For instance, did you know that contemporary 17th century readers might have understood Don Quixote’s famous “tilting at windmills” to be an expression of NIMYBism? I sure didn’t! But I do now that I’ve read Jeva Lange’s 101 guide to wind energy.

That said, I’d like to extend an especial welcome to those who’ve come here feeling lost in the climate conversation and looking for a way to make sense of it. All of us at Heatmap have been there at some point or another, and we know how confusing — even scary — it can be. The constant drumbeat of news about heatwaves and floods and net-zero this and parts per million that is a lot to take in. We hope this information will help you start to see the bigger picture — because the sooner you do, the sooner you can join the transition, yourself.

This series was produced with the generous support of OER Project, which empowers educators around the world.


Without further ado, here’s your Climate 101 syllabus:

Once you feel ready to go deeper, here are some more Heatmap stories to check out:


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The Insiders Survey

Climate Insiders Want to Stop Talking About ‘Climate Change’

They still want to decarbonize, but they’re over the jargon.

Climate protesters.
Heatmap Illustration/Getty Images

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Abroad, the picture hardly seems rosier. China’s new climate pledge struck many observers as underwhelming. Mark Carney, who once led the effort to decarbonize global finance, won Canada’s premiership after promising to lift parts of that country’s carbon tax — then struck a “grand bargain” with fossiliferous Alberta. Even Europe seems to dither between its climate goals, its economic security, and the need for faster growth.

Now would be a good time, we thought, for an industry-wide check-in. So we called up 55 of the most discerning and often disputatious voices in climate and clean energy — the scientists, researchers, innovators, and reformers who are already shaping our climate future. Some of them led the Biden administration’s climate policy from within the White House; others are harsh or heterodox critics of mainstream environmentalism. And a few more are on the front lines right now, tasked with responding to Trump’s policies from the halls of Congress — or the ivory minarets of academia.

We asked them all the same questions, including: Which key decarbonization technology is not ready ready for primetime? Who in the Trump administration has been the worst for decarbonization? And how hot is the planet set to get in 2100, really? (Among other queries.) Their answers — as summarized and tabulated by my colleagues — are available in these pages: You can see whether insiders think data centers are slowing down decarbonization and what folks have learned (or, at least, say they’ve learned) from the repeal of clean energy tax credits in the Inflation Reduction Act.

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Plus, which is the best hyperscaler on climate — and which is the worst?

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The biggest story in energy right now is data centers.

After decades of slow load growth, forecasters are almost competing with each other to predict the most eye-popping figure for how much new electricity demand data centers will add to the grid. And with the existing electricity system with its backbone of natural gas, more data centers could mean higher emissions.

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The Secretary of Energy beat out the EPA’s Lee Zeldin and OMB’s Russ Vought.

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Who’s the biggest climate villain in the Trump administration — other than President Donald Trump himself? Our Heatmap braintrust had one clear answer: Energy Secretary Chris Wright.

Wright entered the Trump administration 2.0 with lots of good will in the energy sector and wonky academia because of his education at MIT and tenure as CEO of a power and fuels company. But his Trumpian turn — terminating billions in energy and climate spending and pivoting to misinformation-riddled tweets — has shocked essentially everyone who thought he’d be a cooler head on energy and climate. Wright’s official X account has become a receptacle for questionable statements about the energy sector, such as the provably false claim that covering the entire planet in solar panels would only produce a fifth of the world’s energy. This prompted Heatmap executive editor Robinson Meyer to suggest that one might call him “Chris Wrong,” instead.

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