Green Options

Move over CO2—you’ve been ousted, along with methane, as the biggest offenders of global climate change. According to a new a study by Purdue University and NASA, the major chemicals most frequently cited as leading to climate change, namely carbon dioxide and methane, are actually outclassed in their warming potential by compounds receiving less attention. The majority of “greenhouse gases” are created by humans.

The results were discovered when researchers studied more than a dozen chemicals, or greenhouse gases as classified by their warming properties defined by the Intergovernmental Panel on Climate Change. From there, the team developed a blueprint for the underlying molecular machinery of global warming. The results appeared in the November 12, 2009 issue of the American Chemical Society’s Journal of Physical Chemistry, just in time for the convergence of world leaders in Copenhagen.

A landfill gas-to-energy plant in Conestoga, Pennsylvania.

When it comes to corporations fighting climate change, landfill owners don’t necessarily leap to mind. But in Michigan, the landfill industry is working to repeal a 19-year-old ban on the disposal of grass clippings and tree trimmings in dumps — on the grounds that the yard waste, mixed with typical garbage when buried, makes a perfect brew for what it terms renewable methane production.

I’m probably going to irritate some people with this post.  I apologize in advance because that is not at all my intention.  For those readers that don’t think climate change is a real problem, I respect the fact that there is uncertainty in that science, but if the majority position of climate scientists is true, the stakes in terms of human suffering among the poor are too high not to act.  For those who think Organic farming is the answer, I’m not trying to argue the whole issue here - I just want to talk about the science associated with climate change and farming.  I have spent months reading the scientific literature on this topic.  That science points to some very specific changes in how we need to farm.  If those changes were compatible with Organic I’d be a big promoter.  The short answer is “Organic farming is not the best option from a climate change point of view.”

I know this sounds like heresy in the “Green Blogosphere,” but before you react, please read on.  I agree in advance that the Organic/non-Organic discussion is much broader than climate change.  In fairness, climate change was never something that “Organic” was designed to address either during its origins in the early 20th century or during the development of the USDA Organic rules between 1990 and 2000.  I have no desire to get in the way of Organic growers making a living (including my good friends who grow Organic of the old school category) or get in the way of Organic customers getting what they want.    I simply believe that it is critical that we, the declining subset of people who take climate change seriously, be accurately informed about this issue.  If we believe we “have the answer” for farming when that answer is wrong, that keeps us from continuing to find the real answer.

Focusing on the Major Crops

Because it would be far too complex to discuss this question for all crops,  I’ll only be talking about the “carbon footprint” of the major row crops (see the pie chart above) - the wheat, corn, hay, barley, oats, corn, soybeans, hay, oats, dry beans, lentils… that make up the bulk of our calorie intake, our vegetable protein intake, and our animal feeds for meat and dairy.  Those crops also make up the vast majority of farmed land, so they are what matters for climate change.  Fruit and vegetable crops are extremely important for health and food enjoyment, but not much for climate change.  Organic today is heavily weighted to the fruit and vegetable segment and beyond that, it is extremely small. Actually, all of Organic only represents 2.6MM acres ( ~0.7%  of US cropland), so it has almost no effect on climate either way. This is only a discussion about the widely held opinion that Organic would help in a climate change sense.

SAB Miller, South African grown, second largest brewer in the world has introduced anaerobic digestion to treat the waste leaving its Alrode Brewery in Gauteng, South Africa. Anaerobic fermentation of organic material produces methane, which is used to reduce the consumption of fossil fuel based energy.

Copper brewhouse in a Trappist brewery

Brewery Waste & Biogas

In the brewery the waste is a collection of unavoidable losses of carbohydrate and protein rich materials, which would otherwise be sold as beer or byproduct and the large quantities of water used to maintain a hygienic operation.

As far as I am concerned, the two biggest problems facing humanity are kicking our addiction to oil, and figuring out a way to get rid of all our garbage without stuffing it into big, endless holes in the ground.

Wouldn’t it be great if we could kill two birds with one stone? One day, we might be able to, but for now at least one company is working on a way to fix their fuel woes within the confines of their own business.

Waste Management, one of the biggest garbage companies in the country, says it will be able to produce 13,000 gallons of liquefied natural gas (LNG) daily from just one landfill in Northern California.

According to a new report published by the Worldwatch Institute, global emissions caused by the “lifecycle and supply chain of animals raised for food”  are much higher than previously thought.   Environmental advisers Jeff Anhang and Dr. Robert Goodland, report previous estimates of greenhouse gases caused by livestock were in fact, underestimated.   

Cow poop is a leading contributor of nitrous oxide and ammonia into the atmosphere, adding heartily to global warming. Cars, as we all know, provide their own fair share of noxious fumes to the environment. But a British team of engineers and racers is working on a way to kill two birds with one stone (metaphorically of course) by developing a race car that can run on cow poop.

Realizing that most technology found in our daily drivers was often first developed for the race track, Oaktec has announced plans to develop a manure-powered rally car, giving all new meaning to the phrase “This car runs like crap!” [ed. note: cow farts and burps contribute far more GHGs than poop, but hey, you gotta start somewhere]

Desert Hills Dairy of Nevada has joined with Carbon Bank Ireland, an emerging leader in cap-and-trade carbon emissions markets, to build the state’s first biogas facility to convert cow manure into electricity.  Along with producing enough sustainable methane to power itself and other equipment at the second largest dairy in Nevada, the high tech digester will produce liquid fertilizer and mulch.

Carbon Bank Ireland specializes in harvesting certified emissions credits from sustainable energy projects, which can be traded in the European carbon markets. While some pundits claim that cap-and-trade is “socialism on a grand scale” (whatever that is), that doesn’t appear to bother the cows.  It also doesn’t appear to bother Nevada, which sees a lot of green in its future.  As reported by Nevada Appeal writer Kirk Caraway, interest in the state’s rich solar, wind and geothermal resources is surging, and it is becoming a desirable location for start-ups that are developing sustainable projects such as the capture of waste heat and the development of hi tech batteries.  Green jobs, anyone?

Using food as a resource in biofuel production is one of the biggest mistakes our country could make. And while we all shake our heads at the idea of corn ethanol…what about using turkey innards? Or Mountain Dew for that matter.

Shaq Wants Your Leftover Beer and Wine for Making Ethanol

First, who ever has leftover alcohol except maybe these guys? The Shaq-backed MicroFueler is a 250-gallon tank for organic feedstock, such as waste wine and beer, that converts it into pure ethanol. It also doubles as a fuel pump and the only waste product is distilled water.

The conductor walks on to the stage and mounts the podium with applause from the crowd. He bows to the audience, then turns to his orchestra and, with one fluid motion pulls music from the vast expanse of silence. Each musician moves, almost mechanically, in perfect time, in perfect concert. The violin section becomes one great body, no longer individual musicians. Together, as one, the orchestra ebbs and flows in crescendo and decrescendo. Melody. Harmony. Symphony.

When thinking about “carbon footprints” it helps to have real numbers to put things in perspective. The EPA estimates that for the US, agriculture represents about 8% of total human-related greenhouse gas emissions. The following is a list with a little of the detail of what makes up the footprint of an acre of a rain-fed Midwestern corn crop with a few other things thrown in for comparison. Since we grow 80-90 million acres of corn its something that matters. The values are all expressed as pounds of CO2 equivalents. If you want Carbon equivalents multiply by 12/44