Nation We’ve lost 60 percent of animal populations since 1970. This generation may be last to save nature, report says October 30, 2018 Ashley May, USA TODAY Comments Off on We’ve lost 60 percent of animal populations since 1970. This generation may be last to save nature, report says "Earth is losing biodiversity at a rate seen only during mass extinctions," according to the World Wildlife Fund’s 2018 Living Planet report.