Living Planet Report
The results of the LPI are published biennially in WWF's Living Planet Report, which acts as a tool to communicate global biodiversity trends to a wide audience. The biennial report, produced in collaboration with the Zoological Society of London and the Global Footprint Network, uses the global LPI as a measure of the health of over 10,000 populations of more than 3,000 species.
The tenth edition of WWF’s Living Planet Report was released on 30th September 2014. It shows that the global LPI has declined by 52% between 1970 and 2010, which means that animal populations are roughly half the size they were 40 years ago. This continued decline can be attributed to humanity's increasing demands on natural resources.