In the mid-1980s, climate research expanded beyond focusing on emissions from the energy sector and fossil fuels, turning its attention to methane as a major contributor to warming.
Hot Topics
Methane has a remarkable ability to trap heat in the atmosphere; its heating capacity is about 80 times greater than that of carbon dioxide over a 20-year period, according to the global warming potential scale.
Although this effect decreases to about 27 times when calculated over a hundred years, this is only because methane decomposes and disappears from the atmosphere faster than carbon dioxide, making it a very dangerous and influential gas in the short term.
A recent study published in the journal PLOS Climate revealed how the National Association of Cattlemen in the United States responded to the first scientific reports linking cattle farming to global warming.
Researchers Jennifer Jacquet and Loredana Lowe from the University of Miami, after examining hundreds of archival documents spanning from 1986 to 1996, concluded that the association focused its efforts during that period on public relations strategies and corporate reputation management to protect consumer confidence and meat sales, while the documents showed a lack of parallel efforts to implement practical modifications to production methods to reduce emissions.
Biological research has proven that ruminant animals are a major source of this gas through natural digestion in their intestines, scientifically known as intestinal fermentation, where bacteria break down fibers and produce gas, most of which, at a rate exceeding 90%, is expelled through the animal's belching, in addition to what is emitted from the decomposition of manure.
Paul Crutzen, an atmospheric chemist and later Nobel laureate, published a seminal paper in 1986 in which he indicated that cattle alone were responsible for about 74% of animal methane overall.
In 1989, a report by the U.S. Environmental Protection Agency confirmed that livestock farming contributes about 15-20% of total methane emissions from human activities worldwide.
Although a representative from the National Livestock Breeders Association attended the workshop that preceded the release of the Environmental Protection Agency report in 1989, the association's internal actions quickly moved towards treating this data as a marketing crisis that threatened consumer demand, especially with the emergence of books and civic campaigns calling on the public to voluntarily reduce meat consumption to protect the environment.
Tags:
science