AndyH
Posts: 6384
Joined: Fri Apr 23, 2010 3:43 pm
Location: San Antonio

Re: A post on EVs' role in mitigating global warming.

Wed Jan 21, 2015 4:05 pm

tmac wrote:AndyH
Agreed 100% EV are the way to go but play small role in GHG emissions

http://cowspiracy.com

Cowsporacy love the name :D shows in many many ways why 7.5 billion cannot continue to eat meat especially beef and hope not to cook the planet.
The whole grass fed vs factory farmed is a smokescreen both are non sustainable

Factory farmed is disgusting in humane, fouls water, feeds ruminants soybeans and corn to cows we could be feeding starving humans, while "grass fed " beef proponents ignore the vast amount of pasture a single cow needs . Simply put we a few earths if even half of the 7.5 billion eat meat like Americans.

The calculation of feed and transport of the beef and the emissions from the cows are important but destruction of land is what you and myself and others are not taking into account.
The habitat and forest destruction to make room for all those cattle significantly increase GHG emissions , those are permanent destruction of rain forest that would act as a carbon sink but are gone.

In short, beef it's Not for dinner ( assuming we want breakfast too!) ;)
http://cowspiracy.com

Tom


Tom - Thank You for the heads-up on this documentary. Finally watched it today. It's one thing to hear people like Jeremy Rifkin remind his audiences that animal ag is the number two direct greenhouse gas emitter, but it's a shock when all the other problems are fit into the puzzle. :shock:

Folks - if you haven't seen this, please add it to your list.

Andy
"The stupid become extinct."-Bill Mollison
2018 Outlander PHEV
2015 smart Electric Drive (lease ended Feb, 2018)
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AndyH
Posts: 6384
Joined: Fri Apr 23, 2010 3:43 pm
Location: San Antonio

Re: A post on EVs' role in mitigating global warming.

Wed Mar 25, 2015 3:36 pm

Nubo wrote:
AndyH wrote:
Nubo wrote:Then I suppose climate change would be even worse if we hadn't killed off so many animals the last couple hundred years. Or, do wild animals not fart? :lol:

The methane emissions from cows and their ilk come from their burps, not farts, as it's bacterial fermentation in their stomachs making the gas.

http://en.wikipedia.org/wiki/Enteric_fermentation
http://www.epa.gov/rlep/faq.html
Globally, ruminant livestock produce about 80 million metric tons of methane annually, accounting for about 28% of global methane emissions from human-related activities. An adult cow may be a very small source by itself, emitting only 80-110 kgs of methane, but with about 100 million cattle in the U.S. and 1.2 billion large ruminants in the world, ruminants are one of the largest methane sources. In the U.S., cattle emit about 5.5 million metric tons of methane per year into the atmosphere, accounting for 20% of U.S. methane emissions.


As abasile covered, there are significant additional emissions from the 'western Ag' feed production process on top of this.


In particular I was thinking about American Bison (ruminants), which once numbered upwards of 60 million before they were nearly hunted to extinction.

The good news is that while bison do burp from time to time, their grazing and fertilizing services dramatically increase the ability of soil to sequester carbon. Healthy soil also sequesters other GHGs that are emitted by soil as it dies. The net result of properly-managed grazing herds appears to be very, very positive for the climate.

The ginormous problem with beef today isn't the methane in their burps, but the industrial systems that use oil-based chemical ag to grow corn and soy to feed to cattle confined in concentrated pens, GHG emissions and damage from their untreated wastes, and the resulting river/lake/ocean dead zones.

Unfortunately, global warming and the subsequent disruption of the water cycle (drought) is reducing the ability of soil processes to sequester greenhouse gasses. This is likely to reduce the benefit of well-managed grazing...
"The stupid become extinct."-Bill Mollison
2018 Outlander PHEV
2015 smart Electric Drive (lease ended Feb, 2018)
OpenEVSE Plus DIY

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