Resumen de Be afraid...
As Earth's population grows, so too does people use of the land, converted from its natural, pre-human state to farms, roads, quarries and more, with an inevitable loss of species. This leads to the question on at what point this threatens the sustainability of society. Scientists have speculated about this for decades, but finally it is possible to start answering that question. Ten per cent of native species have gone from over 58% of all land
