Almost half of Australia untouched by humans: study

By Rob Taylor

CANBERRA (Reuters) - More than 40 percent of Australia, an area the size of India, remains untouched by humans, making the country as critical to the world's environment as the Amazon rainforests, a study said on Wednesday.

Australia has some of the last great wilderness, with three million square kilometers (1.1 million square miles) largely unchanged by industrial civilization, a report for international conservation watchdogs the Pew Environment Group and Nature Conservancy said.

"It's rare on earth in this century," Australian wildlife ecologist and report author Barry Traill told local radio. "We need to hold onto this country. It's just so precious," he said.

Australia was one of five great remaining wilderness zones, along with Antarctica, the Amazon, the Sahara Desert and Canada's northern Boreal, the report said.

Most of the untouched areas were in the country's vast interior and northern savanna, including largely Aboriginal Arnhem Land, northern Cape York Peninsula, the vast southwest Nullarbor plain and the central Gibson desert.

Pristine areas faced their biggest threat from introduced feral animal and plant species including pigs, rabbits, foxes, buffaloes and noxious weeds, the report said.

"Around that core of wild lands, hundreds of millions more acres are healthy enough that they can still support the maintenance of resilient ecosystems," Pew said on its website.

In addition to its wilderness treasures, Australia had some of the world's most protected marine areas, with the Great Barrier Reef the largest living organism, it said.