Reducing carbon-dioxide emissions is primarily a political problem, rather than a technological one. This fact was well illustrated by the fate of the 2009 climate bill that barely passed the U.S. House of Representatives and never came up for a vote in the Senate. The House bill was already quite weak, containing many exceptions for agriculture and other industries, subsidies for nuclear power and increasingly long deadlines for action. In the Senate, both Republicans and Democrats from coal-dependent states sealed its fate. Getting past these senators is the key to achieving a major reduction in our emissions.

Technological challenges to reducing emissions exist, too. Most pressing is the need to develop the know-how to capture carbon dioxide on a large scale and store it underground. Such technology could reduce by 90 percent the emissions from coal- fired power stations. Some 500 of these facilities in the U.S. produce 36 percent of our CO2 emissions.

But these plants aren’t evenly spaced around the country. And therein may lie the key to addressing the political and technological challenges at the same time. If the federal government would invest in carbon capture and storage, it could go a long way toward persuading politicians in every state to sign on to emission reductions.

I’ll get to the specifics of the technology shortly. But first, consider how the costs of emission reduction fall hardest on certain parts of the country: A carbon tax levied on all major sources of released CO2, the approach favored by most of the environmental community, would make energy from coal-fired power plants cost more. To make a significant difference, such a tax would have to amount to $60 a ton.

Midwest Carbon Footprint

As a result, gasoline prices would rise 26 percent, and natural gas for household usage by 25 percent, nationwide. Rich and urbanized states could probably tolerate this. The West Coast, with its hydroelectric power, and the Northeast, which relies to a large extent on natural gas, could most easily absorb the associated increase in energy costs.

But the price of energy in the rural, Midwestern states would more than quadruple because of their large carbon footprint. Midwesterners get most of their electricity from coal; they drive relatively long distances to get to work, shopping and entertainment; and rural homes and buildings use more energy for heating and cooling.

One carbon-tax proposal now being considered is a “cap and dividend” plan that would send the tax revenue back to all U.S. citizens equally. But that would also favor the rich states that are less dependent on driving and coal.

It would be more helpful for the coal-dependent states if the federal government would use revenue from a carbon tax to help develop the technology for carbon capture and storage.

And that brings us to the technological challenges: No plant of any size with the capacity for CCS yet exists, but it has been demonstrated to work at small scales. Three different processes for capturing the CO2 are being tested, and scaling them up for 500-megawatt or 1,000-megawatt facilities should be possible.

For two years, the Mountaineer plant in New Haven, West Virginia, has been capturing and storing a tiny amount of its CO2 -- 2 percent of it -- but plans to build a full-scale carbon-capture plant here have been abandoned. Because Congress has dropped any idea of imposing a tax on carbon emissions, the investment doesn’t make sense.

A large plant in Edwardsport, Indiana, was being constructed with the expensive gasification process that makes it easy to add carbon-capture facilities, but it, too, has been shelved.

China may finish its large demonstration carbon-capture plant before the U.S. gets any model up to scale. Others are planned in Europe, and a small one is operating in Germany. This plant has been unable to get permission for underground storage, so it is selling some of its CO2 to soft-drink companies and venting the rest.

Subterranean Storage

Storing captured CO2 is eminently possible, too. For 15 years, the Sleipner facility in Norway has been storing 3 percent of that country’s CO2 underneath the ocean floor, with no appreciable leakage. Algeria has a similar facility, the In Salah plant, operating in the desert.

One storage strategy under consideration in the U.S. is to inject captured CO2 into huge basalt formations off both the east and west coasts. Inside the basalt, the carbon gas would gradually turn into bicarbonate of soda.

There are other ways to dispose of carbon dioxide. It has been used for enhanced oil recovery for many decades without any danger, and has been effectively stored in depleted oil reservoirs. (The gas is dangerous only in high concentration.)

It remains uncertain how much of the captured CO2 might leak during storage. Even if this were as much as 10 percent, however, it would mean that 90 percent of it would stay underground.

As CCS technology develops, it will have to be made more efficient so that it uses less energy. As it is, the capture phase is expected to require that a power plant burn 20 percent to 25 percent more coal than it otherwise would.

The technological challenges may explain why energy companies haven’t lobbied for subsidies to develop CCS. The electric-energy sector isn’t known for innovation and risk- taking. Just look at the U.S.’s outdated power grid.

But the federal government could pay for the subsidies through a tax on carbon. Such a levy would have other advantages, too: It would raise the cost of energy to reflect the damage that burning coal and oil now do to the environment, and spur the development of renewable sources.

If states with large carbon footprints can’t accept such a tax, the CCS subsidies could be paid from the general fund. The cost to build coal-fired power plants with CCS technology is estimated to be about $5 billion to $6 billion -- about the price of a single nuclear power plant. The total price for the U.S.’s 500 large plants would be $250 billion. That’s as much as the planned modernization and expansion of our missile defense system over 10 years.

But it would slash our carbon emissions by at least 20 percent. There is no other politically possible way to cut CO2 as much, and as quickly -- in a decade or two. And devastating climate change is far more likely than a missile attack.

U.S. investment in CCS technology could also induce China and Europe to follow suit. And this would allow the world time for renewable-energy technologies to mature -- to the point where we could do away with coal burning altogether.

Emerging nation-states like Libya and Palestine are constrained by local elites integration in socio-economic networks.

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Attention is fixed on Mahmoud Abbas' application for Palestinian statehood at the United Nations, and on the capture of state power by Libyan rebels. Have we forgotten to ask whether and under what conditions the nation-state is a viable political vehicle for justice and liberation?

A world composed of nation-states is less than seventy years old. Yet the ideal of "national liberation" dominates the political imagination of many oppressed peoples. Such a politics of emancipation has dire limits because serious power is organised and exercised on a global scale.

Before World War II, the world was made up mostly of empires and colonies. A state of their own seemed to promise freedom and recognition to colonised populations. This is because the world of nation-states masquerades as a world of sovereign equals. Each nation-state supposedly rules its own territory and people, free from outside interference.

Only for the others

This was the ideology behind the United Nations, which was conceived and organised by the Western allies during World War II. The war aims of the US and the UK, as expressed in the Atlantic Charter of 1941, included the idea that all "peoples" had a right to self determination. Winston Churchill was quick to claim that this only applied to those in Nazi occupied Europe, not the subject peoples of the British Empire.

But Churchill was a man of the old world. Already the US had pioneered in Latin America and in its "open door" policies towards China modes of intervention and informal rule that recognised the political independence of subordinate states. The diplomatic historian William Appleman Williams used the term "Anticolonial Imperialism" to describe what the US was up to.

Empires always operate in and through some kind of local administration, whether a colonial state, a kept Raja, or an informal relation with a client power. In mature colonies, much of the day to day work of government was carried out by indigenous people, trained up as civil servants, police, and soldiers. Businesses were often operated and even owned by locals.

Occupying such a colony with imperial officials was not only expensive, it caused friction and generated resistance. Why not give local power brokers a somewhat larger cut (but not too large) to run the place for you? The oppressed "nation" could celebrate "independence", the local elites could enrich themselves, and the imperial power could continue to enjoy the advantages of domination and unequal economic relations.

This was not only empire without colonies, it was an empire that could pose as a supporter of "national liberation".

The United Nations took this concept of the nation-state to a global level. The world came to be composed mostly of small, relatively weak states, each proudly sovereign and jealous of its prerogatives. But each one also enmeshed in the brutal and shocking disparities of wealth and power that have characterised global politics since the nineteenth century. Local elites prospered, while their people toiled away at subsistence level.

A nation-state organisation of the world offers advantages to those who want to sustain global hierarchies of power. It also poses immense challenges to those struggling for freedom.

The immediate problem is which group or set of interests will seize state power. Colonial borders encased many different peoples within the same territory, and divided others. Colonisation produced sectors of society which benefitted from and were in sympathy with imperial power in varying degrees. The result is intractable and recurring clashes of identity and interest.

These conflicts are evident now in Libya and they have fractured the Palestinian national liberation movement.

"Imagined Community"

Even in Europe, there was no "nation" behind the state to begin with. In myriad ways state power was used to create the "imagined community" of the nation, which often enough was a fiction propagated by a dominant ethnicity or social class.

It is one thing to build a nation-state while rising to world dominance, as in the West. It is quite another to do so when you are on the losing end of global inequities in wealth and power.

New holders of state power in the global South - even in a rich state like Libya - are profoundly constrained and face limited options. Local elites are often deeply enmeshed in economic, cultural and political networks that tie them to foreign powers and interests, Western or otherwise.

The usual outcome is some kind of neo-colony. A local political and economic class benefits from relations with outside powers and global elites, to the neglect of the ordinary people who brought them to power and of their political desires.

Such an arrangement takes many forms. One model is the resource rich country, which can sustain a hyper-wealthy elite, while keeping the masses in check with a combination of repression and bread and circuses. This is the likely fate of Libya, if it does not descend into internal conflict over the possession of state power and its benefits.

Another model is that of South Africa's Bantustans, "tribal" states that were given limited "independence". Their function was to outsource security. Like the Palestinian Authority, the Bantustans self-policed a restive population. They also served as a basis for the power and wealth of a local ruling class, connecting it to the larger order that oppressed everyone else.

None of this is to suggest that people seeking liberation should not seek state power. Among other things, the state has the potential to equal the scales between the public good and the private power of capital, foreign or domestic.

But it is to say that the seizure of state power cannot be the end goal of contemporary liberation politics. In the global South, to have a politics only about the nation-state is to play a game with dice loaded against you.

A liberation politics beyond the nation-state would from the beginning reach out to those in other societies struggling also for a just global order. In so much of both the global South and North right now, politics has been reduced to the servicing of narrow interests by cronies holding offices of state.

People around the world are suffering through the nadir of capitalism that is our times. Such circumstances offer possibilities for a local-global politics of liberation.

It is in the global South that liberation movements have the best chance of seizing local state power and its many advantages. At the same time, connections with global struggles for justice will give the free states of the South an international base, a source of power with which to resist becoming a neo-colony.

For it is ultimately only a just global order that long can sustain freedom and equality at home.

Tarak Barkawi is Senior Lecturer in the Centre of International Studies, University of Cambridge.

The views expressed in this article are the author's own and do not necessarily reflect Al Jazeera's editorial policy.