Avi Roy has more numbers:
A damning report by the United Nations shows that today livestock raised for meat uses more than 80% of Earth’s agricultural land and 27% of Earth’s potable water supply. It produces 18% of global greenhouse gas emissions and the massive quantities of manure produced heavily pollute water. Deforestation and degradation of wildlife habitats happens largely in part to create feed crops, and factory farming conditions are breeding grounds for dangerous disease […]
Compared to conventionally grown meat, cultured meat would require up to 99% less land, 96% less water, 45% less energy, and produce up to 96% less greenhouse gas emissions.
One of the most staggering stats I heard in a long time was that it takes “more than 2,400 gallons of water to produce 1 pound of meat, while growing 1 pound of wheat requires only 25 gallons. You save more water by not eating a pound of meat than you do by not showering for six months.”
(Hat Tip: The Dish).