'Shocking': wilderness the size of Mexico lost worldwide in just 13 years, study finds

Researchers say loss of 1.9m square kilometres of intact ecosystems will have profound implications' for biodiversity

Wilderness across the planet is disappearing on a huge scale, according to a new study that found human activities had converted an area the size of Mexico from virtually intact natural landscapes to heavily modified ones in just 13 years.

The loss of 1.9m square kilometres (735,000 sq miles) of intact ecosystems would have profound implications" for the planet's biodiversity, the study's authors said.