by Daniel Bailey
(Michigan, United States)
There are articles that exaggerate the emissions from the meat industry. These don't cite ANY sources at all for their claims. NONE. ZERO.
What does the best-available evidence say? Let's look at the evidence, not just opinions.
Food systems contribute 19%–29% of global anthropogenic greenhouse gas (GHG) emissions, releasing 9,800–16,900 megatonnes of carbon dioxide equivalent (MtCO2e) in 2008. Agricultural production, including indirect emissions associated with land-cover change, contributes 80%–86% of total food system emissions, with significant regional variation.
Response: the worldwatch report is the one with the problems. This came up a few years ago when it was published, and the errors involve double counting, including things that are actually carbon neutral, and some large over-estimates of individual terms. But in any attribution excercise, there are many different ways of slicing things and many of the comparisons that are made are down using inconsistent accountings (ie using full life cycle analysis vs not), and so many of the headlines are a little misleading at face value.
Land Use, Land-Use Change, and Forestry (17% of 2004 global greenhouse gas emissions) - Greenhouse gas emissions from this sector primarily include carbon dioxide (CO2) emissions from deforestation, land clearing for agriculture, and fires or decay of peat soils. This estimate does not include the CO2 that ecosystems remove from the atmosphere. The amount of CO2 that is removed is subject to large uncertainty, although recent estimates indicate that on a global scale, ecosystems on land remove about twice as much CO2 as is lost by deforestation.
Transportation (13% of 2004 global greenhouse gas emissions) - Greenhouse gas emissions from this sector primarily involve fossil fuels burned for road, rail, air, and marine transportation. Almost all (95%) of the world's transportation energy comes from petroleum-based fuels, largely gasoline and diesel.
The most reasonable current estimate for the percentage of emissions that come from tropical deforestation is 10 percent.
It is obviously to someone’s benefit to make meat eating and livestock raising an easily attacked straw man (with the enthusiastic help of vegetarian groups) in order to cover up the singular contribution of the only new sources of carbon — burning the stored carbon in fossil fuels and to a small extent making cement (both of which release carbon from long term storage) — as the reason for increased greenhouse gasses in the modern era.
If cattle flatulence on a natural grazing diet were a problem, heat would have been trapped a 1000 years ago when, for example, there were 70 million buffalo in North America not to mention innumerable deer, antelope, moose, elk, caribou, and so on all eating vegetation and in turn being eaten by native Americans, wolves, mountain lions, etc.
Targeting livestock as a smoke screen in the climate change controversy is a very mistaken path to take since it results in hiding our inability to deal with the real causes. When people are fooled into ignorantly condemning the straw man of meat eating, who I suspect has been set up for them by the fossil fuel industry, I am appalled by how easily human beings allow themselves to be deluded by their corporate masters.
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