Some one million animal and plant species are now threatened with extinction, many within decades, a new report from the Intergovernmental Science-Policy Platform on Biodiversity and Ecosystem Services (IPBES) has found.The IPBES Global Assessment Report on Biodiversity and Ecosystem Services is the most comprehensive ever completed on the subject. It was compiled by 145 expert authors from 50 countries over the past three years, with inputs from another 310 contributing authors.