2016-08-19. How Garbage Trucks Can Drive a Green Future.

posted Aug 19, 2016, 1:01 PM by Alan Gould   [ updated Aug 19, 2016, 1:02 PM ]
By ROBERT B. CATELL and JOANNA D. UNDERWOOD, The New York Times. For GSS Energy Use chapter 9. Excerpt: ...In the wake of last year’s Paris climate agreement, the mayor [Bill de Blasio] announced plans to cut emissions from activities controlled by the city government by 80 percent by 2050. ...[including] cutting emissions from the city’s vehicle fleets by 50 percent by 2025, and by 80 percent by 2035. Halving emissions in less than a decade requires immediate, concerted action. ...renewable natural gas... is nearly identical to geologic natural gas, so trucks and buses equipped with natural gas engines can also run on renewable natural gas. But it’s not a fossil fuel like shale gas; it’s a renewable, made from biogases emitted by decomposing organic waste, like wastewater or food waste.... ...where food wastes are a major source, as they are in New York City, renewable natural gas can be carbon-free or even net carbon-negative over its life cycle. ...Cities like Sacramento; South San Francisco, Calif.; and Grand Junction, Colo., are producing renewable natural gas from local waste sources and using it to power refuse trucks and other municipal vehicles. In Southern California, Orange County, Long Beach, Culver City and Santa Monica have committed to using the fuel in their transit buses. Santa Monica has also ordered 100 “near zero” natural gas engines for its bus fleet.  ...production of the gas using anaerobic digesters is ramping up....  http://www.nytimes.com/2016/08/19/opinion/how-garbage-trucks-can-drive-a-green-future.html