Protecting 30% of planet could bolster economy, study says

Scientists claim widespread conservation can bring rewards if right policies are followed

Nearly a third of the world's oceans and land area could be placed under environmental protections without harming the global economy, and even produce bumper economic benefits if the right policies were followed, according to a global assessment.

Ecosystems around the world are collapsing or hovering on the brink of disaster, with a million species threatened with extinction. But if at least 30% of the planet's land and oceans were subject to conservation efforts, that mass extinction could be avoided and vital habitats restored, scientists estimate.