Animal agriculture is the leading cause of deforestation, water consumption, rainforest destruction, species extinction, habitat loss, topsoil erosion, ocean “dead zones,” and more greenhouse gases than the transportation industry.
Animal agriculture contributes more greenhouse gas than the transport sector. The most widely recognised figure in the literature today is that animal agriculture contributes 14.5% of global GHGs, which takes into account land use changes and indirect emissions related to animal farming and supply chains. That’s more than the UN Intergovernmental Panel on Climate Change’s estimate of the emissions produced from powering all the world’s road vehicles, trains, ships and aeroplanes combined. Eating one pound of hamburger does the same damage as driving your car for more than three weeks.
Plant-based food production is responsible for significantly less pollution than animal farming. Studies based on Lifecycle Assessment methods show substantially lower GHG emissions for most plant-based food than for animal products.
One kilo of beef uses 15,400 Litres of water which is the equivalent of showering for between 17 and 36 hours straight. Compared to Water requirements for meat protein production are higher than for the production of vegetable protein. Differences are large (about a factor 26) when rain suffices for production of feed and smaller (roughly a factor 4.4) when intensive irrigation is necessary.
Food from animal agriculture is significantly more resource intensive than food from plant-based agriculture – requiring on average, 10 g of vegetable protein to generate 1 g of animal protein, reflecting in differences in land requirements. Compared with soybean production, land requirements are roughly a factor 6–17 larger for meat protein production.
Seven percent of the world’s fishing stock are depleted; 17% over-exploited; and 52% fully exploited. That leaves only 3% having a potential for expansion in total production and 1% recovering from depletion. We could see fishless oceans by 2048.
We are in a human-induced sixth mass extinction, the last one was 66 million years ago.
Sources www.cowspiracy.com/facts  UN Food and Agriculture Organisation,  Fifth assessment report of the UN Intergovernmental Panel on Climate Change “Agriculture, Forestry and Other Land Use”, 2014  “(Carlsson-Kanyama and González, 2009; Pathak et al., 2010; Bellarby et al., 2012; Berners-Lee et al., 2012 (AR5, WG3, Chp 11, Section 11.4.3) (see page 839 )  www.coolaustralia.org/the-water-we-eat  yvw.com.au/home/inyourhome/understandingyourwateruse/index.htm  American Journal of Clinical Nutrition, Reijnders & Soret, 2003: “ “  How Our Food Choices can Help Save the Environment by Steve Boyan, PhD  “General Situation of World Fish Stocks” United Nations Food and Agriculture Organization  Impacts of Biodiversity Loss on Ocean Ecosystem Services, science.sciencemag.org/content/314/5800/787.full.pdf+html  Accelerated modern human–induced species losses: Entering the sixth mass extinction, advances.sciencemag.org/content/1/5/e1400253.full.pdf+html  https://en.wikipedia.org/wiki/Extinction_event