In our hearts, many Americans know that addiction to oil is responsible for the war in Iraq. But while oil addiction is the nexus between the causes of global warming and the threats to US national security, global warming itself is a much bigger threat to security than oil addiction alone would be.
One irony of the debate on climate change is that “uncertainty” is used as an argument by those who would delay effective action on global warming. Uncertainty about future climate patterns, however, should not be a reassuring excuse for inaction; it should sound the alarm for an urgent response. Climatic uncertainty and instability have historically been at the root of many long-range threats to human security, and are again today.
Climate change has been one of the major sources of violence and instability during most of human history. From the fourth century BC until the battle of Ayn Jalut in 1260, which ended the Mongol Invasion of the middle east, world history was dominated by climate-change wars. For 1,700 years, the drying out of central Asia sent wave after wave of nomads to topple the Roman Empire, unseat Chinese dynasty after dynasty, expel the Byzantine Empire from Asia Minor and finally topple the Arab Caliphate by sacking Baghdad. Attila the Hun and Genghis Khan were propelled on to the world scene by climate change.
The map of global security in the 21st century, however, begins with the Tibetan Plateau. From its glaciers originate the great rivers of the Asian heartland: Yangtze, Salween, Syr Darya, Amu Darya, Mekong, Irawaddy, Brahmaputra, Ganges and Indus. Roughly one-third of humanity depends on food grown in these watersheds. Global warming puts this entire circuit of fertility at risk.
Climate change and disruption will put pressure on populations with scarce resources, creating competition for those resources and sparking conflict. At the same time, decreasing crop yields, drought, rising sea levels and other climate impacts will create new refugee populations, further destabilising already vulnerable regions. Over 200 million people live in coastal cities and low-lying countries which would be affected by rising sea levels.
This was recently summarised in a report [pdf] for the military prepared by Peter Schwartz of the Global Business Network, who warned that greater climatic variability – regardless of its details – could create enormous instability in societies already under stress. “Just look at Somalia in the early 1990s,” Schwartz said. “You had disruption driven by drought, leading to the collapse of a society, humanitarian relief efforts, and then disastrous US military intervention. That event is prototypical of the future.”
A recent trip to Cambodia reminded me again of the impact that climate change could have on a civilisation. Religious fervour and slavery were only one part of how the ancient Khmers were able to devote so much manpower to building the Angkor temples. The elegance and craftsmanship of the relief panels required dedicated, skilled and focused artisans. The Khmer kings had to be able to feed their people with the labour of relatively small portion of the population. The ecosystem of the Tonle Sap Lake made this possible, providing protein in the form of fish, and calories in the form of paddy rice. Every ancient Khmer artisan carving the sandstone devatas of the temple carvings was supported by the gifts made possible by a big slice of rich natural ecosystem. It was those natural services – above all – that made the Khmer empire powerful, and Angkor possible.
Now, Cambodia still has only 13 million people; every citizen still enjoys a fair chunk of the Tonle Sap's bounty. But to the north lies China, with more than 1 billion people, whose government announced last year that by 2030 it will have exploited all of its water supplies. One response is already in the works: damming the Mekong River. But this carries the risk of dismembering the web of ecosystem services provided by both the river and the Tonle Sap.
In the end, China may risk long-term ecological disaster in order to avert short-term economic upheaval. It will require a new kind of economic and ecological cooperation to avoid more and more of these scenarios.
I do not typically testify on congressional panels alongside a former CIA director, the head of the Council on Foreign Relations, admirals and four-star generals. My appearance before the House Select Committee on Global Warming and Energy Independence last April, therefore, was a first for me. What I found stunning was that, despite our very different backgrounds, the testimony the five of us delivered was, in all but the smallest details, identical.
The hearing was the day after a meeting of the UN Security Council on the same topic, and two days after the release of a blue ribbon military report on how global warming threatens national security.
At the beginning, Representative James Sensenbrenner, a member of the Republicans – the minority party in Congress – known as the ranking minority member, took on the committee chair, Representative Ed Markey. He lamented that some of the solutions to climate change advocated by “extremists” would be devastating. But after the panel finished, and Sensenbrenner had tried to force us into yes or no answers on nuclear energy and coal, he retreated with the comment: “Well, at least you all admit that this is complicated.”
Overall there were few fireworks, and the proceedings reflected a consensus on climate change that is finally seeping into Washington.
The US Congress has an important role to play in developing policies that will ensure national security by cutting American oil dependence and curbing global warming. The Sierra Club believes Congress should act now to raise fuel economy standards, invest in renewable energy and energy efficiency, move forward on clean, renewable fuels and adopt economy-wide caps on global warming emissions.
Growing up, I used to ask my father repeatedly: “Daddy, what did you do in the war?” Children born today may turn to us and ask: “What did you do in the warming?” US elected officials should lead Americans towards an answer we can give with pride: that we led the world back from the precipice of climate collapse and climate conflict.
Carl Pope is the executive director of the Sierra Club