Is the world running out of wilderness?

If you don't have weekend plans yet, you may want to consider running into the wilderness.

• Average human's ecological impact on the planet shrinking, study suggests

According to a new study published in Current Biology,every single corner of the globe is experiencing a shocking loss of wildernessover 10 per centin only 20 years.

How much wilderness has the world lost?

The measured amount is 3.3 million square kilometresabout the size of twoAlaskas. In Canadian terms, that's almost 600 Prince Edward Islandsor fiveAlbertas.

Researchers from the University of Northern British Columbia say most of the global wilderness loss isin South America around the Amazon, and in Africa where human encroachment for pasture lands and resource extraction is at an all time high.

The scale of loss in thoseareas is staggering. Up to 30 per centof wilderness in the Amazon basin has disappeared in the past two decades.

And Canada is not immune. According to researchers, we'velost wilderness areas all across the country much of itin the North, but alsobasically anywhere in Canada with vast expanses of forest andwildlife.

Why is wilderness so important?

The senior author of the study, Oscar Venter, saidthe value of wild spacesis hard to overstate. In areas where human developmenthas encroached on biologically rich landscapes, wildlife is often put in serious peril.

"They really represent the last refuge for many of the world's endangered species," said Venter,"really the last places that they're holding on is in the wilderness."

Humans rely on wilderness, too, and not just for its inherent environmental and economic value.

"[Wilderness is]really the last home and livelihood for many of the world's most economically and politically marginalized people. A lot of the world's Indigenous cultures live in or use wilderness areas in often traditional ways."

What's the difference between wilderness protection and habitat protection?

When it comes to endangered species and discussions of habitat destruction, we often focus on either very unique habitats or biodiversity hotspots.But just because an area is wilddoesn't mean something is officially endangered there, or thatit is particularly biodiverse.

Take,for instance, the permafrost in Canada's North. It'snot exactly bursting at the seams with dense wildlife or even endangered species, butthe vast expanses of tundra in Canada are crucial to mitigating climate change.

Permafrost acts as a huge carbon sink. If it'sdestroyed or removed because of human encroachment, massive amounts of carbonare liberated into the atmosphere.

How did the researchers measure the area of wilderness lost?

It wasn't easy. Researchersfirst had to define what they meant bywilderness:areas free of any human disturbance, basicallyan untouched ecosystem.In Canada, think areas like the heart of the Rocky Mountains or the Arctic tundra. That means no roads, fewpeople per square kilometreand no cities, agriculture or pasturesnearby.

Researchers then compared their measurements from 17 years ago to today. Essentially,they considered the entire Earth wilderness asked the question: how much human encroachment is there?

The answer: just 23 per centof the entire surface of the Earth is considered true wilderness, compared to 33 per cent onegeneration ago.

What does this mean for conservation efforts?

For one thing, it suggests our conservation efforts to date haven't really worked. The research indicates we should maybe focus on a broader picture of what should be protected.

The problem is that protecting "wilderness"is a tough sell. It's much easier to say, 'don't cut this part of the forest down because an adorable cuddly panda lives there'.

At this point, there is no major globalagreement or policy in place that protects wilderness over discrete ecosystems or areas.We have to realize that when an ecosystem is gone, it's gone. It is easier to restore an endangered animal from a captive population than to replace an ecosystem that took a millennium to build and balance.

The amount of wilderness we've lost 10 per cent in 17 years is staggering. If this pace keeps up, we'll be without pristine ecosystems in a decade.

Butif there's one hopeful thing that this study does say, it's that it's not too late there's still time to protect the planet in a way that will truly have a lasting impact.