Here’s a “Your Dot” contribution pushing back against apocalyptic depictions of the collision between humans and the climate system — written by Peter B. Kelemen, the Arthur D. Storke Professor and vice chair in the Department of Earth and Environmental Sciences at Columbia University. Kelemen has done a lot of interesting work on possible ways to capture carbon dioxide from air (none being easy or cheap):

Fear Itself

“We already know it is too late to reverse the planet’s transformation, and we know what is going to happen next – superstorms, super-droughts, super-pandemics, massive population displacement, water scarcity, desertification and all the rest. Massive destruction, displacement and despair. Our worst fears are already upon us. The reality is far worse than anyone has imagined.”

These phrases are distilled from “Writing at the End,” an essay by Nathaniel Rich in Sunday’s New York Times Book Review. They capture its doomsday ethos, and its breathtaking certainty. Rich, a novelist, is sure he knows the causes of our present ills, and the nature of the near future. He probably feels that he learned this from the 98 percent of climate scientists who – famously – agree on some things. I am part of that community; we agree that human greenhouse gas emissions are having a huge, negative effect on global climate. But I don’t agree with Nathaniel Rich.

Apocalyptic warnings sell newspapers, power Web sites, and are surprisingly good for marketing. Beyond the media, in the sciences and social sciences, if your research predicts a scary outcome, your name gets in the news, your grants get funded, and you feel like Paul Revere (though you might be Chicken Little). It’s a heady experience.

Meanwhile, my children are fearful of, and almost paralyzed by, the prospect of an inevitable, dystopian future. They would like to contribute to avoiding calamity, but they don’t see where to start, and they are told it is too late to begin. And my children are lucky, in a stable home, among the 3 percent, talented, athletic, well educated. In the face of an overarching climate of fear, people with less opportunity find there is nothing they can do to help avoid “destruction, displacement and despair.”

However, climate catastrophe is not inevitable, let alone irreversible. Of course, it could happen. It is logical to expect that, as atmospheric greenhouse gases increase and the world warms up, the extra energy in the atmosphere and oceans will move things around in unusual ways for which we are not prepared. The costs will likely be very high. We should work to avoid this, for simple, practical reasons. Avoiding emissions now will be far less expensive than capturing carbon dioxide from air in the future. But.....our mistakes are correctable, and there is plenty of reason for optimism about what people can accomplish in the face of necessity.....