World Wildlife Fund on released the Living Planet Report 2014. In this context, consider the following statements
I. The theme of the report is Species and Spaces, People and Places.
II. Populations of fish, birds, mammals, amphibians and reptiles have declined by 52 percent since 1970
III. Freshwater species have declined by 76 percent
IV. The report's measure of humanity's Ecological Footprint is provided by the Global Footprint Network
Which is/are correct?