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By Tom Miles GENEVA (Reuters) - Biodiversity has decreased by an average of 28 percent globally since 1970 and the world would have to be 50 percent bigger to have enough land and forests to provide for current levels of consumption and carbon emissions, conservation group WWF said on Tuesday. Unless the world addresses the problem, by 2030 even two planet Earths would not be enough to sustain human activity, WWF said, launching its "Living Planet Report 2012", a biennial audit of the world's environment and biodiversity - the number of plant and animal species. Yet governments are not on track to reach an agreement at next month's sustainable development summit in Rio de Janeiro, WWF International's director general Jim Leape said

It’s been a rough year for Western Australia’s iconic but endangered Carnaby’s black cockatoos ( Calyptorhynchus latirostris ), which are endemic to the state and live nowhere else in the world.

To monitor the biodiversity of a freshwater habitat, you could camp out by the water and count the rare wildlife.

To monitor the biodiversity of a freshwater habitat, you could camp out by the water and count the rare wildlife. Or you could just scoop up a cup of water. A new Dutch study has found that the DNA traces in a small sample of a body of water can reveal the species that live in it.

For thousands of years people on Palau have used sustainable methods of fishing and preservation. The virtually untouched, biodiverse reefs and pelagic marine animals are a testament to these practices.