Solar Tribune

Good Solar Gone Bad?


Long the darling of environmentalists, solar is now powering less eco-friendly businesses as well.

Generating energy with solar panels can a very good thing. Solar increases our energy independence and decreases our carbon footprint. Solar can create new jobs and business opportunities while improving the resiliency of our electric grid.  Still, like any technology, solar is neutral. Solar can be used in ways that some people may disagree with.  As the price continues to fall for installing solar, the environmentalists who have long supported government incentives for solar are seeing some of the unexpected consequences of their strategy.VH2PhotoLayout2005

Across the US,large solar arrays are popping up on the roofs of confined animal feeding operations, or CAFOs. These industrial scale livestock operations raise cattle, hogs and poultry… not in the pastoral setting of a Grant Wood painting, but in large buildings that have more in common with a factory than a farm. “Factory Farming” is controversial not only for the living conditions of the animals (which many see as unhealthy and inhumane) but also for the tremendous impact that their waste management operations have on the health of local waterways.

Suffice it to say, operators of CAFOs do not share much common ground with the environmental community. Politically, they are historically mortal enemies. Rural electric cooperatives, who often serve large livestock operations, have also not had warm and fuzzy relationships with solar supporters. So what is turning factory farmers and the rural electric co-ops who supply their electricity into solar lovers? Simple: MONEY.
The U.S. Department of Agriculture offers 25 percent Rural Energy for America (REAP) grants up to $500,000 for renewable energy systems for ag producers and small businesses. These grants have become a regular funding stream for CAFO solar projects, and often large solar installation companies will offer grant-writing as part of their services to farmers. They establish close working relationships with their local USDA rural development offices, and these grants become increasingly easy for experienced players to obtain. The combination of federal tax credits and USDA dollars, along with state, local or utility incentives, can bring the payback period down to less than one year, in many cases, because of the CAFO’s huge energy demand. They rely on huge cooling and ventilation systems to keep the animals alive during the summer months, and solar matches their peak demand perfectly. Rural Electric Co-ops like the arrangement, because, despite the savings from solar, the confinements are large new customers in what is otherwise a shrinking market base.

Setting aside the issue of humane treatment of livestock, what is the downside of large livestock operations using solar? It’s better than having them use coal-fired electricity, isn’t it? There is an argument to be made there. CAFOs will be built with or without cheap solar power. On the other hand, tax dollars are increasing the profit margin of CAFO owners, while they are not being held responsible for the environmental impacts of their waste disposal. That cost too, in many cases, falls to the taxpayer.

According to a report from the Center on Disease Control: “The most pressing public health issue associated with CAFOs stems from the amount of manure they produce. CAFO manure contains a variety of potential contaminants. It can contain plant nutrients such as nitrogen and phosphorus, pathogens such as E. coli, growth hormones, antibiotics… animal blood or copper sulfate used in footbaths for cows…Large farms can produce more waste than some U.S. cities—a feeding operation with 800,000 pigs could produce over 1.6 million tons of waste a year. That amount is one and a half times more than the annual sanitary waste produced by the city of Philadelphia, Pennsylvania. Annually, it is estimated that livestock animals in the U.S. produce each year somewhere between 3 and 20 times more manure than people in the U.S. produce, or as much as 1.2–1.37 billion tons of waste. Though sewage treatment plants are required for human waste, no such treatment facility exists for livestock waste.”

In earlier periods when livestock were raised on pastures, the manure was gradually and evenly distributed across the landscape, creating fertile fields in which crops could be raised. Now, huge amounts of manure are stored in piles or lagoons, then sprayed across the bare ground, where rain can carry the contaminants directly into wetlands, creeks, rivers, lakes, municipal water supplies and eventually, the ocean.

Again, from the CDC report: “Contamination in surface water can cause nitrates and other nutrients to build up. Ammonia is often found in surface waters surrounding CAFOs. Ammonia causes oxygen depletion from water, which itself can kill aquatic life… Nutrient over-enrichment causes algal blooms, or a rapid increase of algae growth in an aquatic environment Algal blooms can cause a spiral of environmental problems to an aquatic system. Large groups of algae can block sunlight from underwater plant life, which are environmental health habitats for much aquatic life….Some algal blooms can contain toxic algae and other microorganisms, including Pfiesteria , which has caused large fish kills in North Carolina, Maryland, and the Chesapeake Bay area….Water tests have also uncovered hormones in surface waters around CAFOs. Studies show that these hormones alter the reproductive habits of aquatic species living in these waters, including a significant decrease in the fertility of female fish. CAFO runoff can also lead to the presence of fecal bacteria or pathogens in surface water. One study showed that protozoa such as Cryptosporidium parvum and Giardia were found in over 80% of surface water sites tested… in water from manure land application is also responsible for many beach closures and shellfish restrictions.”solarturkeys

Time for full disclosure, here. During the early 2000’s, I was a consultant for the Union of Concerned Scientists, doing farmer outreach to promote the use of renewable energy. More recently,I worked as a farm energy specialist for the National Center for Appropriate Technology. There was not, at that time, a lot of discussion about the potential environmental blowback of promoting renewables to farmers through the USDA program. Honestly, we just didn’t think we would be this successful at promoting solar. Like the ethanol mandate and the production tax credit for large-scale wind that came before REAP, massive government intervention continues to add to the economic instability and environmental unsustainability of the agricultural sector. It is long past time for a major overhaul of farm subsidies.  In the meantime, we can still enjoy a cheap, corn-fed, solar-powered pork chop…while we try not to think about where it came from.

Recent Posts