Layer hens: 69,683,000
Broiler chickens: 9,005,578,000
"The meat industry also has a significant impact on global warming. Livestock production accounts for 18 percent of global greenhouse gas emissions, including 9 percent of carbon dioxide and 37 percent of methane gas emissions worldwide, according to the Livestock, Environment and Development (LEAD) Initiative, an international consortium of government and private agencies based at FAO headquarters in Rome.More than two-thirds of all agricultural land is devoted to growing feed for livestock, while only 8 percent is used to grow food for direct human consumption, LEAD reported. If the entire world population were to consume as much meat as the Western world does-176 pounds of meat per capita per year- the global land required would be two-thirds more than what is presently used, according to Vaclav Smil, professor of environment and geography at the University of Manitoba and participant in the EVP study."
It is the rise of industrial meat that has brought down small family ranches and destroyed the pastoral scene of a green field spotted with contented cows.