nairobi [Kenya]May 11 (ANI): Natural burping and burping of ruminants of animals such as cows, buffaloes and other animals contribute the most to environmental methane emissions.
Methane has been found to be a primary contributor to the formation of ground-level ozone, a dangerous air pollutant and greenhouse gas, exposure to which causes 1 million premature deaths each year. Over a 20-year period, methane gas has been predicted to be 80 times more potent in greenhouse warming than carbon dioxide.
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Researchers have now found that adopting 100 percent of the most effective strategies to reduce methane emissions from cows and other ruminants could meet the methane reduction target by 2030 to prevent global warming from pre-emptively. 1.5°C above industrial levels could help, but the same strategies are insufficient to reach methane reduction targets for 2050 due to projected increased demand for livestock products.
Claudia Arndt of the International Livestock Research Institute in Nairobi, Kenya, along with her colleagues, analyzed the effects of published strategies to reduce methane emissions from ruminant livestock systems.
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The authors found that the three feed management practices could reduce methane emissions by an average of 12 percent per unit of meat or milk, while increasing animal productivity.
In addition, the authors found that five mitigation strategies could reduce absolute methane emissions per unit of meat or milk as well as by an average of 21 percent.
According to the study published in PNAS, disparity between high-income, middle-income and low-income countries means that high-income regions may be able to meet their methane reduction targets through the adoption of effective mitigation strategies, while The income of middle- to low-income areas may not be able to do so.
Global food systems contribute up to 30 percent of global greenhouse gas (GHG) emissions. The Paris Agreement target of limiting global warming to 1.5 °C above pre-industrial levels is unlikely to be achieved if food systems continue to operate under the business as usual (BAU) scenario.
Of food-related GHG emissions, methane (CH4) from livestock contributes 30 percent of global anthropogenic CH4 emissions, 17 percent of global food system GHG emissions, and 5 percent of global GHG emissions. Of the global livestock CH4 emissions, 88 percent are contributed by enteric fermentation.
Methane or CH4 is a short-lived climate pollutant. Given its disturbed lifetime in the atmosphere of about 12.5 years, it contributes significantly to near-term global warming.
Its global warming potential is 84 or 28 for 20- or 100-year time horizons, respectively.
When evaluating the contribution of global food systems to CH4 emissions over a 20-year period rather than the commonly used 100-year time period for national GHG inventories, the contribution of CH4 to food system GHG emissions more than doubled, 17 from 36 per cent per annum
Achieving nationally determined contributions and climate-neutral goals in 2050 depends on reducing methane emissions.
In the context of regional reduction in methane emissions, technological solutions to reduce methane from agricultural production, particularly strategies to reduce methane from intestinal fermentation by ruminants, are an important part of achieving these climate goals. . However, there is little quantitative data on the potential for reduction. Limiting global warming to 1.5 °C requires reducing agricultural CH4 emissions by 11 to 30 percent by 2030 and 24 to 47 percent by 2050, depending on 2010 GHG emission levels and various mitigation scenarios.
The global population is projected to increase by 23 percent between 2010 and 2030, with most of the increase occurring in low- and middle-income countries (LMICs).
Ruminants contribute about half of the animal protein produced by animals. Ruminants in LMICs play an important role in food security. Ruminants may convert foods that are inedible to humans, such as pasture foods and grain byproducts produced on marginal lands or from subsistence agricultural production systems, into nutrient-dense human-food foods.
Ruminants also provide other benefits, such as traction and manure for fuel and fertilizer. In addition, human population growth in LMICs is generally high, while consumption of animal source foods often falls short of dietary recommendations or is dependent on ruminant meat and milk for livelihood and nutritional security.
Thus, from a feed-food competition perspective, the increase in ruminant production in LMICs should be dependent on human inedible feed (that is, feed and by-products). In contrast, high-income countries (HICs) have very low population growth and animal protein consumption often above recommended dietary levels. (ANI)
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