Bill McKibben

New Yale green site draws attention to state climate efforts

I think various Grist contributors have linked over there a few times already, but I’ve been remiss in not explicitly noting the debut of environment360, the new online publication from the Yale School of Forestry & Environmental Studies. It’s come out of the gate with a bang, with pieces from high-profile writers like Bill McKibben, […]

350.org conference call

As he told Grist readers earlier this year, Bill McKibben is kicking off a new campaign based around the number 350 — as in 350 parts-per-million of CO2 in the atmosphere, the level scientists like Jim Hansen now believe is the safe upper threshold. (The bad news: we’re already closing in on 390.) The website, […]

McKibben kicks off 350.org, a new international grassroots climate campaign

If only atmospheric chemistry gave you points for trying. A year ago this week, we were celebrating. I and six college-age colleagues of mine, joined by thousands of organizers across the country, had managed to pull off 1,400 simultaneous demonstrations against global warming in all 50 states. Though we didn’t have much in the way […]

What is the safe upper limit for atmospheric CO2?

The nation's top climate scientist, NASA's James Hansen, apparently now believes "the safe upper limit for atmospheric CO2 is no more than 350 ppm," according to an op-ed by the great environmental writer Bill McKibben. Yet while preindustrial levels were 280, we're now already at more than 380 and rising 2 ppm a year!

Like many people, in the 1990s I believed 550 was the target needed to avoid climate catastrophe -- but now it's clear that:

1. 550 ppm would lead to the greatest disaster ever experienced by human civilization -- returning us to temperatures last seen when sea levels were some 80 feet higher. This is especially true because ...
2. long before we hit 550, major carbon cycle feedbacks -- the loss of carbon from the tundra and the Amazon, the saturation of the ocean sink (already beginning) would almost certainly kick into high gear, inevitably pushing us to much, much higher CO2 levels (see here, here, and my book).

Exactly when those feedbacks seriously kick in is the rub. No one knows for sure, but based on my review of the literature and interviews of leading climate scientists, somewhere between 400 and 500 ppm seems most likely. It could be lower, but it probably couldn't be much higher.

So I, like the Center for American Progress and the world's top climate scientists, now believe 450 ppm is the upper bound. That said, I have spent two decades managing, analyzing, researching, and writing about climate solutions and can state with some confidence that:

1. Staying below 450 ppm is technologically doable, but would be the greatest achievement in the history of the human race, by far. It would require a global effort sustained for decades, comparable to what the U.S. did for just the few years of World War II (the biggest obstacle is not technological, but political -- conservatives currently would never let progressives and moderates pursue such a strategy).
2. If 350 ppm is needed (and I'm not at all sure it is) then the deniers and delayers have won, since such a target is hopeless.

In 2008, I will devote a fair amount of ink bits to laying out the solution (there really is only one), but to understand why 450 is so hard, and 350 all but inconceivable, let's look at the odd way McKibben describes the solution:

Notable quotable

“If the internet goes down, global warming will triumph for sure.” — Bill McKibben

A very promising climate change solution with an image problem

Bill McKibben's new column in Orion magazine reports on one of the most effective ways to cut carbon emissions that we've got, a mature technology which stands ready to recycle enormous amounts of waste heat into electricity. It boggles my mind that we're not doing this everywhere, instead of discussing new coal plants or nukes. Talk about low-hanging fruit!

The article centers on the fine work of the Chicago company Recycled Energy Development, piloted by frequent Gristmill contributor Sean Casten, and discusses the technology's image problem: it's not as sexy as wind or solar. Here's an excerpt, but the article is so short, I encourage a quick visit to the link above:

New book from McKibben & co. aids grassroots action

Tuesday marks the release (yes, on recycled paper) of Fight Global Warming Now, the Step It Up 2007 team's handbook for grassroots action on climate (and most other issues) in our communities. It's a blueprint for success based on their own experiences.

Step It Up 2: Who's a Leader is just around the corner (Nov. 3), and there is an increasing corps of leaders committing to turn up at the events: eight members of Congress and two presidential candidates: go here to find an event in your neighborhood to support. If you find your choices lacking (hello, North Dakota?) organize one of your own: like coal, it's easy, cheap, and high-impact.

McKibben’s clarion call

Bill McKibben has a clarion call of an op-ed in yesterday’s Washington Post. The reality of climate change is moving much more quickly than politics: The Democratic majority is finally beginning to move legislation that would commit the United States to long-term reductions in carbon dioxide emissions — the first law Congress might actually pass […]

The next round of McKibben’s campaign

I forgot some of the coolest (and breaking) news! At my panel earlier today, Bill McKibben "pre-announced" something exciting: On Nov. 3, a year before the presidential election, he will be organizing Step It Up 2: Revenge of the Nerds. OK, I made up the title, but not the news. At the first Step It […]