A Fast-Emptying Ark: The World Grows Quieter By The Day
The World Wildlife Fund's Living Planet Index, which monitors 32,000 separate populations of species around the world, found that on average they were 69% smaller than they had been in 1970.
The World Wildlife Fund's Living Planet Index, which monitors 32,000 separate populations of species around the world, found that on average they were 69% smaller than they had been in 1970.