Global Warming's Terrifying New Chemistry

Global warming is, in the end, not about the noisy political battles here on the planet's surface. It actually happens in constant, silent interactions in the atmosphere, where the molecular structure of certain gases traps heat that would otherwise radiate back out to space. If you get the chemistry wrong, it doesn't matter how many landmark climate agreements you sign or how many speeches you give. And it appears the United States may have gotten the chemistry wrong. Really wrong.

In February, Harvard researchers published an explosive paper in Geophysical Research Letters. Using satellite data and ground observations, they concluded that the nation as a whole is leaking methane in massive quantities. Between 2002 and 2014, the data showed that US methane emissions increased by more than 30 percent, accounting for 30 to 60 percent of an enormous spike in methane in the entire planet's atmosphere.

To the extent our leaders have cared about climate change, they've fixed on CO2. Partly as a result, coal-fired power plants have begun to close across the country. They've been replaced mostly with ones that burn natural gas, which is primarily composed of methane. Because burning natural gas releases significantly less carbon dioxide than burning coal, CO2 emissions have begun to trend slowly downward, allowing politicians to take a bow. But this new Harvard data, which comes on the heels of other aerial surveys showing big methane leakage, suggests that our new natural-gas infrastructure has been bleeding methane into the atmosphere in record quantities. And molecule for molecule, this unburned methane is much, much more efficient at trapping heat than carbon dioxide.

The EPA insisted this wasn't happening, that methane was on the decline just like CO2. But it turns out, as some scientists have been insisting for years, the EPA was wrong. Really wrong. This error is the rough equivalent of the New York Stock Exchange announcing tomorrow that the Dow Jones isn't really at 17,000: Its computer program has been making a mistake, and your index fund actually stands at 11,000.

These leaks are big enough to wipe out a large share of the gains from the Obama administration's work on climate change -- all those closed coal mines and fuel-efficient cars. In fact, it's even possible that America's contribution to global warming increased during the Obama years. The methane story is utterly at odds with what we've been telling ourselves, not to mention what we've been telling the rest of the planet. It undercuts the promises we made at the climate talks in Paris. It's a disaster -- and one that seems set to spread.

The Obama administration, to its credit, seems to be waking up to the problem. Over the winter, the EPA began to revise its methane calculations, and in early March, the United States reached an agreement with Canada to begin the arduous task of stanching some of the leaks from all that new gas infrastructure. But none of this gets to the core problem, which is the rapid spread of fracking. Carbon dioxide is driving the great warming of the planet, but CO2 isn't doing it alone. It's time to take methane seriously.

To understand how we got here, it's necessary to remember what a savior fracked natural gas looked like to many people, environmentalists included. As George W. Bush took hold of power in Washington, coal was ascendant, here and around the globe. Cheap and plentiful, it was most visibly underwriting the stunning growth of the economy in China, where, by some estimates, a new coal-fired power plant was opening every week. The coal boom didn't just mean smoggy skies over Beijing; it meant the planet's invisible cloud of carbon dioxide was growing faster than ever, and with it the certainty of dramatic global warming.

So lots of people thought it was great news when natural-gas wildcatters began rapidly expanding fracking in the last decade. Fracking involves exploding the sub-surface geology so that gas can leak out through newly opened pores; its refinement brought online new shale deposits across the continent -- most notably the Marcellus Shale, stretching from West Virginia up into Pennsylvania and New York. The quantities of gas that geologists said might be available were so vast that they were measured in trillions of cubic feet and in centuries of supply.

The apparently happy fact was that when you burn natural gas, it releases half as much carbon dioxide as coal. A power plant that burned natural gas would therefore, or so the reasoning went, be half as bad for global warming as a power plant that burned coal. Natural gas was also cheap -- so, from a politician's point of view, fracking was a win-win situation. You could appease the environmentalists with their incessant yammering about climate change without having to run up the cost of electricity. It would be painless environmentalism, the equivalent of losing weight by cutting your hair.

And it appeared even better than that. If you were President Obama and had inherited a dead-in-the-water economy, the fracking boom offered one of the few economic bright spots. Not only did it employ lots of people, but cheap natural gas had also begun to alter the country's economic equation: Manufacturing jobs were actually returning from overseas, attracted by newly abundant energy. In his 2012 State of the Union address, Obama declared that new natural-gas supplies would not only last the nation a century, but would create 600,000 new jobs by decade's end. In his 2014 address, he announced that "businesses plan to invest almost $100 billion in factories that use natural gas," and pledged to "cut red tape" to get it all done. In fact, the natural-gas revolution has been a constant theme of his energy policy, the tool that made his restrictions on coal palatable. And Obama was never shy about taking credit for at least part of the boom. Public research dollars, he said in 2012, "helped develop the technologies to extract all this natural gas out of shale rock -- reminding us that government support is critical in helping businesses get new energy ideas off the ground."

For a brief shining moment, you couldn't have asked for more. As Obama told a joint session of Congress, "The development of natural gas will create jobs and power trucks and factories that are cleaner and cheaper, proving that we don't have to choose between our environment and our economy."

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Unless, of course, you happened to live in the fracking zone, where nightmares were starting to unfold. In recent decades, most American oil and gas exploration had been concentrated in the western United States, often far from population centers. When there were problems, politicians and media in these states paid little attention.

The Marcellus Shale, though, underlies densely populated eastern states. It wasn't long before stories about the pollution of farm fields and contamination of drinking water from fracking chemicals began to make their way into the national media. In the Delaware Valley, after a fracking company tried to lease his family's farm, a young filmmaker named Josh Fox produced one of the classic environmental documentaries of all time, Gasland, which became instantly famous for its shot of a man lighting on fire the methane flowing from his water faucet.