A version of this article first appeared in the Sunday July 21 edition of the Rutland Herald /Times Argus.

Helping farms and Vermont businesses thrive while cleaning up the environment is a win all around.

Conservation Law Foundation is pleased to serve on the Executive Committee to help Vermont’s homegrown Green Mountain Power Cow Power program to pave the way for cleaner air, happier farm neighbors and more successful Vermont businesses.

The program works by turning farm manure into electricity. The average cow produces more than 30 gallons of manure a day. Multiply that amount by 1,000 — the numbers of cows on a typical Cow Power farm — and you have a lot of cow manure. That means there is also a lot of methane, which can be used to create electricity.

Here is how it works. The manure is placed in a digester at the farm that converts the waste into methane gas. The gas fuels an engine that runs an electric generator.

Gases that would otherwise create a nuisance and release harmful and very potent greenhouse gases are instead captured to produce electricity.

Farms have an additional revenue source, and the rest of us have cleaner air and renewable power.

Currently GMP Cow Power farms are producing electricity for nearly 3,000 Vermont homes and businesses. With the expansion of GMP Cow Power so that it is now available to any GMP customer, there are opportunities to grow the program even further. Customers can sign up and make a voluntary 4-cent-per-kilowatt-hour payment on all or a portion of their electric bill. The contribution goes directly to support Cow Power projects to reduce pollution and produce 100 percent renewable power that gets used in Vermont.

Methane is one of the most potent greenhouse gases. Its global warming impact over a 20-year horizon is nearly 75 times more potent than carbon dioxide because methane traps radiation much more effectively. But instead of simply being released into the air, farm methane can be used to produce electricity. This reduces pollution and makes the farm methane projects some of the best fighters of climate change.

These projects don’t just create renewable energy; they effectively capture some of the most potent global warming gasses.

Twelve GMP Cow Power farms remove the equivalent of over 40,000 metric tons of carbon dioxide from the atmosphere every year, in addition to replacing 6,800 tons of carbon from other electric sources. This is equivalent to removing more than 9,000 cars from the highway each year that would have burned 5.3 million gallons of gasoline. These are big numbers — and the biggest benefit comes from removing methane.

Removing farm-generated methane is great but it comes with some real challenges. The first is financial. The equipment is expensive and requires steadfast maintenance to operate smoothly. It is not like a refrigerator you plug in and forget about, and is mostly economically viable only for our larger farms at this stage of technological development.

To be a real success, we need to make this work for smaller farms as well. A few smaller-scale applications are underway that look promising. For instance, some simpler digesters are used in other parts of the world. The ingenuity of Vermont’s farmers and engineers will undoubtedly yield a product that works well on smaller farms within the next decade, but we don’t have it yet.

One way to improve the economics is to find a way to value and pay for the many real benefits of farm methane projects. They are counted now as renewable power, but offer additional advantages as well. One approach would involve credits or payments that recognize their value in reducing methane pollution. That could make it economically feasible to operate smaller-scale projects, or even applications that use digesters alone, without producing electricity.

Another opportunity – and challenge – is expanding the materials used in the digester. Some farms now use additional organic waste in their digesters, such as waste from ice cream manufacturing or fish production. Currently only pre-consumer waste can be used on farms, and off-farm substances cannot make up more than 49 percent of the total digested waste.

New opportunities arise as Vermont moves to expand digesting for managing solid waste. Some organic wastes are very good fuel for digesters and can produce more methane per pound than manure, but the challenge is to make sure the waste is handled well from beginning to end. After digestion is complete and electricity is made, waste and nutrients still remain. We must be careful not to import or spread more nutrients than our land is capable of absorbing on our farm fields. Lake Champlain is already suffering from excess nutrients, and digesting our waste should not be allowed to make this problem worse.

Another new possibility includes expanding how the “products” made with farm digesters are used. Currently farms use the heat produced from the digesters to keep the digester warm. But this heat could also be used to support greenhouses or a new district heating project, among other possibilities. The challenge is to be as resourceful as possible and, like our farms, use as much of the output as possible. This will expand the reduce, reuse and recycle practice even further by adding “upcycling” — converting waste materials into products of better quality or with greater environmental value — while providing an additional revenue source.

Cow Power presents real, exciting opportunities and challenges. The leadership and innovation Vermont’s farms, businesses, utilities and customers have already shown are poised to take these efforts even further.  If you are a GMP customer, your participation in GMP Cow Power and your 4 cents per kilowatt-hour makes a huge difference. Sign up now at: http://www.greenmountainpower.com/renewable/cow/enroll/

This article first appeared in the Sunday May 5 edition of the Rutland Herald /Times Argus.

For over a decade, Vermont’s hardworking cows and farmers have been keeping our lights on, curbing greenhouse gas emissions and helping local businesses grow. The renewable energy produced by cow manure in Vermont now powers 2,990 homes and businesses, including Killington Resort, Long Trail Brewing Company and Vermont Clothing Company.

The greenhouse gas emissions avoided by these projects is equivalent to taking over 9,000 cars off the road each year that would have burned 5.3 million gallons of gasoline.

There is no question — Vermont leads in advancing farm methane projects, and our production of this renewable energy continues to increase. It is a legacy to be proud of, and one that will soon be expanding.

The Cow Power program was started by Central Vermont Public Service in 2002 as a way to meet electric customers’ demand for renewable power. With the merger of CVPS with Green Mountain Power and recent approval from the Vermont Public Service Board, the program is now expanded and available to any customer of Green Mountain Power. That’s a good thing, since farm production of power has outpaced the in-state demand. It is time to close that gap.

The program could be replicated by other utilities or expanded to serve other customers. Perhaps someday it will be available statewide — but for now Cow Power is only available to GMP customers.

GMP customers can sign up for the program and make a voluntary 4 cent per kilowatt hour payment on all or a portion of their electric bill. All the proceeds go to Vermont farmers to produce electricity. And all GMP Cow Power purchases provide customers with 100 percent renewable power. It’s a small investment for a cleaner planet and a healthier future for our children and grandchildren.

Here’s how it works. Manure produced on a farm is put into a digester at the farm. The bacteria in the digester convert the waste into methane gas. The gas fuels an engine that runs an electric generator and creates electricity. Heat generated from this process is used to keep the digester warm. Remaining solids are processed for bedding or soil amendments — and the liquid, which still contains nutrients, is used for fertilizer.

The benefits of GMP Cow Power extend well beyond the supply of electricity. With the volatility of milk prices, the option to produce power provides real economic benefits to farmers in tough times. It also significantly reduces odors, making for happier farmers and neighbors. The gases and compounds that typically produce farm odors and contribute to climate change are captured to produce electricity. The gas keeps lights on — instead of creating a stink.

Vermont businesses have been as creative and hardworking as our farms in turning their use of GMP Cow Power into gold and rightfully expanding Vermont’s solid environmental reputation.

In Woodstock, the trolley that runs through town is operated on Cow Power and features creative posters informing riders about Cow Power and how it helps keep the planet clean.

The Vermont Clothing Company in St. Albans produces Cow Powered T-shirts, which it creatively sells in cardboard milk cartons that describe Cow Power. And as the sole supplier of T-shirts to the Deepak Chopra Foundation, the company enhances the foundation’s commitment to a cleaner and healthier planet.

Killington Resort, a business that depends on snowfall and avoiding a warming climate, is using GMP Cow Power to operate cow-painted gondola cars, while promoting the climate change benefits of Cow Power and its partnership with local dairy farms.

Here’s the real beauty of Cow Power: It’s a 100 percent local program, where 100 percent of the proceeds go to help you and your neighbors create a healthier planet for future generations everywhere. This is a success worth building on and expanding, now that it is available to all 250,000 GMP customers in Vermont.