The broiler industry is the process by which broiler chickens are reared and prepared for meat consumption. Worldwide, in 2005 production was 71,851,000 tonnes.From 1985 to 2005, the broiler industry grew by 158%. A key measure of performance is the Feed conversion ratio (FCR), the ability to convert feed into edible product. In 2018 the FCR of broilers is about 1.5, or 1.5kg of feed to produce 1 kg of meat. This compares very favorably with other sources of meat. It is estimated that broilers produce 6kg of greenhouse gas per 1kg of meat, as compared to 60kg GHG /kg for beef cattle.