The living planet index (lpi), which measures trends in thousands of vertebrate species populations, shows a decline of 52% between 1970 and 2010. biodiversity is declining in both temperate and tropical regions, but the decline appears to be greater in the tropics. according to the world wildlife federation (wwf) population sizes of terrestrial vertebrate species have halved over the last 40 years.

along with hunting, is the major cause of the decrease in the terrestrial vertebrates throughout the world.

a) air pollution b) habitat change c) climate change d) invasive species