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Livestock farming is a major source of greenhouse gas emissions. [8] At the same time, livestock farming is affected by climate change. Farm animals' digestive systems can be put into two categories: monogastric and ruminant. Ruminant cattle for beef and dairy rank high in greenhouse gas emissions.
Canadian dairy farmers commonly feed their cattle corn or barley silage as high nutrient food sources to increase milk production. Although corn and barley are both efficient and economic sources of feed, these two feed sources are responsible for large amounts of greenhouse gas (GHG) emission in Canada.
Livestock produces the majority of greenhouse gas emissions from agriculture and demands around 30% of agricultural freshwater needs, while only supplying 18% of the global calorie intake. Animal-derived food plays a larger role in meeting human protein needs, yet is still a minority of supply at 39%, with crops providing the rest.
The industry's role in agricultural greenhouse gas emissions has also been noted to implicate environmental consequences. Various measures have been put in place in order to control the amount of phosphorus excreted by dairy livestock .
Livestock produces the majority of greenhouse gas emissions from agriculture and demands around 30% of agricultural freshwater needs, while only supplying 18% of the global calorie intake. Animal-derived food plays a larger role in meeting human protein needs, yet is still a minority of supply at 39%, with crops providing the rest.
In 2013 FAO publicly partnered with International Meat Secretariat and the International Dairy Federation [10] and many of the same authors of the first report published a subsequent (2013) study for the FAO, revising their estimate of anthropogenic greenhouse gas emissions due to livestock downward to 14.5% [11] [12] without addressing any of ...
Regardless, if the FAO's report of 18% is accurate, that still makes livestock the second-largest greenhouse-gas-polluter. A PNAS model showed that even if animals were completely removed from U.S. agriculture and diets, U.S. GHG emissions would be decreased by 2.6% only (or 28% of agricultural GHG emissions).
Ruminant cattle for beef and dairy rank high in greenhouse gas emissions. In comparison, monogastric, or pigs and poultry-related foods, are lower. The consumption of the monogastric types may yield less emissions. Monogastric animals have a higher feed-conversion efficiency and also do not produce as much methane. [125]