"It puts the annual cost of forest loss at between $2 trillion and $5 trillion.
The figure comes from adding the value of the various services that forests perform, such as providing clean water and absorbing carbon dioxide.
The study, headed by a Deutsche Bank economist, parallels the Stern Review into the economics of climate change.
It has been discussed during many sessions here at the World Conservation Congress.
The first phase concluded in May when the team released its finding that forest decline could be costing about 7% of global GDP. The second phase will expand the scope to other natural systems.Key to understanding his conclusions is that as forests decline, nature stops providing services which it used to provide essentially for free.
So the human economy either has to provide them instead, perhaps through building reservoirs, building facilities to sequester carbon dioxide, or farming foods that were once naturally available.
Or we have to do without them; either way, there is a financial cost.
But, he said, governments and businesses are getting the point.
“Times have changed. Almost three years ago, even two years ago, their eyes would glaze over.
“Today, when I say this, they listen. In fact I get questions asked - so how do you calculate this, how can we monetize it, what can we do about it, why don’t you speak with so and so politician or such and such business.”
