Climate Climate & Energy

DIY renewable energy projects

So you want some do-it-yourself climate solutions. Popular Science is the place to go.

The magazine details how, for $300, you can build a vertical wind turbine (pictured below) for your home in about three days. It will generate 50 kilowatt-hours per month, which might be about 10 percent of your electricity use, depending on the size of your house and how efficient you are. You can also download plans at windstuffnow.

Or maybe you want something a tad bit easier to make, something to "keep your gadgets powered even when the grid fails you." Follow these instructions, and for a mere three hours in work and $150 in parts, you'll have your very own solar charger (pictured below).

The magnitude of drought and floods will increase with climate change

A very good article in the Washington Post lays out the problem we face.

"Global warming will intensify drought, and it will intensify floods," explains Stephen Schneider, editor of the journal Climatic Change and a lead author for the authoritative Intergovernmental Panel on Climate Change (IPCC). Why?

As the air gets warmer, there will be more water in the atmosphere. That's settled science ... You are going to intensify the hydrologic cycle. Where the atmosphere is configured to have high pressure and droughts, global warming will mean long, dry periods. Where the atmosphere is configured to be wet, you will get more rain, more gully washers.

The droughts will be especially bad. How bad?

Richard Seager, a senior researcher at Lamont-Doherty Earth Observatory of Columbia University, looked at 19 computer models of the future under current global warming trends. He found remarkable consistency: Sometime before 2050, the models predicted, the Southwest will be gripped in a dry spell akin to the Great Dust Bowl drought that lasted through most of the 1930s.

Enter a climate video contest, win a Toyota hybrid

Watch this quickie eco-video, then make your own and enter it to win cool prizes.

(Having trouble viewing the video? Download the latest version of Flash.)

Injecting CO2 into oil wells is not real carbon sequestration

Capturing CO2 and injecting it into a well to squeeze more oil out of the ground is not real carbon sequestration. Why? When the recovered oil is burned, it releases at least as much CO2 as was stored (and possibly much more). Therefore, CO2 used for such enhanced oil recovery (EOR) does not reduce net carbon emissions and should not be sold to the public as a carbon offset.

Yet a company, Blue Source, LLC, proposes to do just that: to capture the CO2 from a fertilizer plant, pipe it to an oil field, and inject it into wells for EOR :

The company hopes to profit from the project by earning credits for the carbon reductions in voluntary carbon markets and by selling carbon dioxide to energy companies.

The deal will cut CO2 from the plant by about 650,000 tonnes per year by permanently storing the emissions in the oil fields, he said. The U.S. Department of Energy says that capturing CO2 from power plants for enhanced oil recovery could greatly boost U.S. oil reserves while permanently keeping CO2 from reaching the atmosphere.

Uh, no. To repeat, if the captured CO2 is used to extract oil that releases CO2 when it is burned, then how is that offsetting anything?

On the climate change ‘point of no return’

I've argued that scientists are not overestimating climate change, and in fact are underestimating it because they are omitting crucial amplifying feedbacks from their models. In this post, I'll show how these omissions suggest the climate has a "point of no return" that severely constrains the safe level of human-generated emissions.

A major 2005 study [$ub. req'd] led by NCAR climate researcher David Lawrence, found that virtually the entire top 11 feet of permafrost around the globe could disappear by the end of this century. Using the first "fully interactive climate system model" applied to study permafrost, the researchers found that if we somehow stabilize CO2 concentrations in the air at 550 ppm, permafrost would plummet from over 4 million square miles today to 1.5 million. If concentrations hit 690 ppm, permafrost would shrink to just 800,000 square miles.

Small countries are going green

While the western media focuses primarily on what the developed world is doing to solve the climate crisis, there's some great coverage on how Third World countries are greening too. SciDev's "Science in the Himalayas," a series of editorials and features, gives credence to the notion that local, community efforts can be just as effective as large-scale centralized ones. And low-tech solutions are often just as good as their high-tech counterparts.

Nepal's successes in scientific application in recent decades aren't about grandiose hydropower dams or major infrastructure projects.

The new technologies that have worked have been indigenously designed, based on traditional skills and knowledge, and are cheap and easy to use and maintain. In fact, to visit Nepal these days is to see the "small is beautiful" concept of development economist E. F. Schumacher in action.

From Nakarmi's Peltric Sets to multi-purpose power units based on traditional water mills, from biogas plants to green road construction techniques in the mountains, Nepalis have shown that small is not just beautiful but also desirable and possible.

Bjorn Lomborg’s new book misunderstands risk and investment

This is a guest essay from Jon A. Anda, President of the Environmental Markets Network, an organization within Environmental Defense focused on legislation to create an efficient carbon market. He was previously a Vice Chairman of Morgan Stanley. —– Bjorn Lomborg’s forthcoming book says to Cool It about global warming. I am anxious to read […]

The Nation reports on sustainable revitalization of the New Orleans neighborhood

This article by Rebecca Solnit is reprinted from the Sept. 10, 2007 issue of The Nation, released today, which focuses on the aftermath of Hurricane Katrina, two years later. Solnit is the author of a dozen books, including, most recently, Storming the Gates of Paradise: Landscapes for Politics.

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The word "will" comes up constantly in the Lower Ninth Ward now; "We Will Rebuild" is spray-painted onto empty houses; "it will happen," one organizer told me. Will itself may achieve the ambitious objective of bringing this destroyed neighborhood back to life, and for many New Orleanians a ferocious determination seems the only alternative to being overwhelmed and becalmed. But the fate of the neighborhood is still up in the air, from the question of whether enough people can and will make it back to the nagging questions of how viable a city and an ecology they will be part of. The majority of houses in this isolated neighborhood are still empty, though about a tenth of the residents are back, some already living in rehabilitated houses, some camped in stark white FEMA trailers outside, some living elsewhere while getting their houses ready. If you measured the Lower Ninth Ward by will, solidarity and dedication, from both residents and far-flung volunteers and nonprofits, it would be among the best neighborhoods in the United States. If you measured it by infrastructure and probabilities, it looks pretty grim. There are more devastated neighborhoods in New Orleans and neighboring St. Bernard Parish, let alone Mississippi and the Delta, but the Lower Ninth got hit hard by Katrina. Its uncertain fate has come to be an indicator for the future of New Orleans and the fate of its African-American majority.

A closer look at the argument for climate change underestimation

My previous post debunked an article that argued scientists have seriously overestimated climate change. Now let's look at the evidence for a serious underestimation of climate change.

To do that, we must understand the fatal flaw with the IPCC's over-reliance on the poorly named "equilibrium climate sensitivity" (ECS). Recall that the ECS is the "equilibrium change in global mean surface temperature following a doubling of the atmospheric (equivalent) CO2 concentration," which the IPCC's 2007 Fourth Assessment Report concluded was 2 to 4.5°C.

You might think that the ECS tells you how much the planet's temperature will rise if humans emit enough CO2 to double its atmospheric concentration. But it doesn't. It is just a theoretical construct. It tells you only how much the planet's temperature will rise if CO2 concentrations double and then are magically frozen.

That's because the ECS omits key carbon cycle feedbacks that a rise in the planet's temperature will likely trigger. For instance, a doubling of CO2 to 550 ppm will lead to the melting of the permafrost and the release of huge amounts of carbon currently frozen in it. These amplifying (or positive) feedbacks are the main subject of this post.

U.S. energy consumption decreased from 2005 to 2006

According to new data from the DOE, total U.S. energy consumption actually declined from 2005 to 2006, in large part due to an increasing demand for renewables. Rather fascinating stuff.

Details here.