in relation to the ecological footprint of our current population. Human population growth is continuing (at a slowing rate, but it is continuing) and the growth imperative enshrined in the global economic system shows no signs of changing.
Given that the real problem set is so much larger than just climate change (i.e. we face an amplifying convergence of climate change, oil depletion and food depletion) our civilization is toast. We'll do all we can, especially when the problems become undeniable, just because that's our Buddha nature. But the chance to save our civilization appears to have slipped past unremarked. No big deal, other civilizations have collapsed in the past and there's no reason ours should be exempt. It's just too bad that in getting to this point we have damaged the Earth so much that the chances of another techno-industrial civilization arising from our ashes have been cut to about zero.
This report is notable for its frankness, but even these dire predictions (a cost up to 20% of global GDP) fail to account for the amplifying effects of a convergence of a number of problems over the next 10 to 20 years.
The main converging forces that are going to interact with climate change to potentially destabilize civilization are my favourite hobby horse Peak Oil, along with declining grain production - global food shortages due to soil and water depletion.
When these three factors collide, each will make dealing with the others more difficult, and in some cases solutions in one area will make problems in another worse. Examples of this include using non-sequestering coal plants to replace declining natural gas for electricity generation, or market reallocation of natural gas towards home heating and away from fertilizer production.
Our growth-based economy requires an unending stream of resource inputs, no matter how efficient it becomes at using those resources and dealing with the resulting wastes. It's obvious that indefinite growth on a finite planet is not possible, and if we continue with business as usual at some point the global economy is going to go into permanent contraction. What happens then is anyone's guess, because we've never done it before. Economic "instability" is inevitable. Whether it turns into a crash or not depends on a lot of things, but the probability is non-zero.
We're in heap big trouble here. We have less than ten years to get effective global mitigation strategies in place, and we're still taking baby steps on all these issues.
Oh, and one more factor to keep our eyes on is the extinction rate:
Changes to Earth's biodiversity have occurred more rapidly in the past 50 years than at any time in human history, creating a species loss greater than anything since a major asteroid impact wiped out the dinosaurs.
That's the conclusion of Global Biodiversity Outlook 2, a report released today by the United Nation's Convention on Biological Diversity.
"In effect, we are currently responsible for the sixth major extinction event in the history of the Earth, and the greatest since the dinosaurs disappeared, 65 million years ago," the report states.
The wide-ranging report also states that demand for resources globally exceeds the biological capacity of the Earth by some 20 percent.
Among the findings:
* The average abundance of species declined 40 percent between 1970 and 2000 while species in rivers, lakes and marshlands have declined by 50 percent.
* Between 12 and 52 percent of species within well-studied higher taxa including birds, mammals and amphibians are threatened with extinction.
* In the North Atlantic, populations of large fish have declined 66 percent in the last 50 years.
* Since 2000, 6 million hectares of primary forest have been lost annually.
* In the Caribbean, average hard coral cover declined from 10 to 50 percent in the last three decades.
* 35 percent of the world's mangroves have been lost in the last two decades.
"Two thirds of the services provided by nature to humankind are in decline, worldwide," said Ahmed Djoghlaf, Executive Secretary of the U.N.'s Convention on Biological Diversity, in an open letter to all of the planet's citizens. "Humans have made unprecedented changes to ecosystems in recent decades to meet growing demands for food and other ecosystems services."
Everyone do the Apocalypso!