The search for cleaner energy sources for transportation is taking trucking in some interesting directions, but one source is often overlooked or even dismissed: renewable natural gas. RNG is methane gas produced by decomposing organic matter from sources such as landfills, dairy farms, and wastewater treatment plants. It can be economically collected and used to power trucks. It's already a source of fuel for many refuse collection fleets. Hugh Donnell of Cummins Westport, maker of the engines that turn this harmful waste gas into motive power, describes the challenges and benefits of wider adoption of RNG as a truck fuel.

Cummins Westport 

Coalition for Renewable Natural Gas 

Waste Management & Renewable Energy 

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