California garbage trucks fueled by ... garbage

Hundreds of trash trucks across California are rumbling down city streets using clean fuel made from a dirty source: garbage. The fuel is derived from rotting refuse that San Francisco and Oakland residents and businesses have been discarding in the Altamont landfill since 1980. Since November, the methane gas created from decaying detritus at the 240-acre landfill has been sucked into tubes and sent into an innovative facility that purifies and transforms it into liquefied natural gas. Almost 500 Waste Management Inc. garbage and recycling trucks run on this new source of environmentally friendly fuel instead of dirty diesel. In a state that has passed the most stringent greenhouse gas reduction goals in the United States, the climate change benefits of this plant are twofold — methane from the trash heap is captured before entering the environment and use of the fuel produces less carbon dioxide than conventional gasoline...read more

Only in the next to last paragraph to you find out:

But to many who may want to use the technology, the cost of purifying the methane into usable liquefied natural gas can be a daunting barrier. The $15.5 million it took to build Altamont's LNG facility is far more than it costs to build a small electrical plant.

Four state agencies contributed grants to build the facility.

May be less carbon dioxide, but it's garbage in - wasteful spending out.

Otherwise known as political pollution.