If we don’t change direction soon, we’ll end up where we’re heading.
So begins the Executive Summary of the International Energy Agency’s World Energy Outlook 2011.
And where is it we are heading?
We cannot afford to delay further action to tackle climate change if the long-term target of limiting the global average temperature increase to 2°C, as analysed in the 450 Scenario, is to be achieved at reasonable cost. In the New Policies Scenario, the world is on a trajectory that results in a level of emissions consistent with a long-term average temperature increase of more than 3.5°C. Without these new policies, we are on an even more dangerous track, for a temperature increase of 6°C or more.
Four-fifths of the total energy-related CO2 emissions permissible by 2035 in the 450 Scenario are already “locked-in” by our existing capital stock (power plants, buildings, factories, etc.). If stringent new action is not forthcoming by 2017, the energy-related infrastructure then in place will generate all the CO2 emissions allowed in the 450 Scenario up to 2035, leaving no room for additional power plants, factories and other infrastructure unless they are zero-carbon, which would be extremely costly.
Unfortunately, we’ve come to learn 450 ppm CO2 is much too high to avoid catastrophic climate consequences.
The conclusion that limiting CO2-equivalent to 450 ppm will succeed in limiting temperature increase to 2°C is based on the assumption that no feedback loops will kick in, an assumption that is already proving unfounded – for example, Arctic amplification is already kicking in and thawing permafrost will further accelerate global warming.
If humanity wishes to preserve a planet similar to that on which civilization developed and to which life on Earth is adapted, paleoclimate evidence and ongoing climate change suggest that CO2 will need to be reduced from its current ~390 ppm to at most 350 ppm. To be safe, we’ll likely have to get back to pre-industrial levels of 280 ppm, and rather quickly.
And how are we doing? The European Environment Agency keeps track.

Even under the most optimistic (more accurately, unrealistic) scenarios, it’s looking like the IEA’s outlook is unjustifiably rosy. The concentration of CO2 in the atmosphere is now about 390 ppm, however, the concentration of CO2e has already hit 450 ppm.
A 2011 paper by Dr. Minqi Li of the University of Utah lays out the horrible and inexorable consequences of continuing to pump greenhouse gases into the atmosphere:
It is now widely understood that human economic activities have led to emissions of greenhouse gases, mainly carbon dioxide emissions from fossil fuels consumption, which contribute to long-term global warming and threaten to bring about global ecological catastrophes.
In 2010, the global average land and ocean surface temperature was 14.6°C, which was 0.9°C higher than in 1880 and 0.3°C higher than in 2000 (NASA 2011).
If global warming rises above 2°C (relative to the pre-industrial time), dangerous climate feedbacks may be triggered, leading to the release of more greenhouse gases from soil and ocean. For this reason, 2°C warming is generally considered by scientists as the “safe limit” beyond which global warming may be out of human control.
A 3°C warming would destroy the Amazon rainforest, leading to a further warming of 1.5°C. Southern Africa, Australia, Mediterranean Europe, and Western US would turn into deserts. Sea level could rise by 25 meters and billions of people could become environmental refugees.
With a 4°C warming, the melting of the Arctic permafrost could release massive amount of carbon dioxide and methane. Algae, the main carbon sinker in the ocean, would die out. The world is set for runaway global warming that could lead to additional temperature rises by several degrees.
If global warming rises to 5°C and above, much of the world would cease to be inhabitable and global human population could suffer a catastrophic decline. Table 4 summarizes the potential consequences of various degrees of global warming. It is not exaggerating to say that the very survival of the human civilization for centuries to come is at stake.
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Without any further increase in greenhouse gases, the current level of greenhouse gases already implies a long-term warming of 2-4°C.
Note that Dr. Li, an economist, does not hesitate to point the finger at human economic activity as the cause of climate change.
Naomi Klein emphasizes this same point – that capitalism is the culprit – at The Nation: lowering global emissions as drastically and as rapidly as climate science demands can be done only by radically reordering our economic and political systems in ways antithetical to the “free market” belief system. Climate change is a consequence of unrestrained greed.
The fact that the earth’s atmosphere cannot safely absorb the amount of carbon we are pumping into it is a symptom of a much larger crisis, one born of the central fiction on which our economic model is based: that nature is limitless, that we will always be able to find more of what we need, and that if something runs out it can be seamlessly replaced by another resource that we can endlessly extract. But it is not just the atmosphere that we have exploited beyond its capacity to recover—we are doing the same to the oceans, to freshwater, to topsoil and to biodiversity. The expansionist, extractive mindset, which has so long governed our relationship to nature, is what the climate crisis calls into question so fundamentally. The abundance of scientific research showing we have pushed nature beyond its limits does not just demand green products and market-based solutions; it demands a new civilizational paradigm, one grounded not in dominance over nature but in respect for natural cycles of renewal—and acutely sensitive to natural limits, including the limits of human intelligence.
Climate change is a message, one that is telling us that many of our culture’s most cherished ideas are dangerous and destructive enough to not only imperil human civilization but to ravage the capacity of Earth to sustain life. Averting catastrophic climate change requires nothing less than a radical overhaul of our economy and society. Averting catastrophic climate change requires that the nations of the world abandon their obsession with economic growth and instead focus, above everything else, on slashing fossil fuel consumption.
Beginning like, now. Not next week, next year, next election, next congress, next climate conference. Now.
Fat chance of that happening.