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Global meat production has tripled in the past three decades and could double its present level by 2050.
Among the key findings in the report are:
• More than 1.7 billion animals are used in livestock production worldwide and occupy more than one-fourth of the Earth's land.
• Production of animal feed consumes about one-third of total arable land.
• Livestock production accounts for approximately 40 percent of the global agricultural gross domestic product.
• The livestock sector, including feed production and transport, is responsible for about 18 percent of all greenhouse gas emissions worldwide.
http://news.stanford.edu/news/2010/march/livestock-revolution-environment-031610.html
