My View • Before we curb global warming, let's make sure it's real

Al Gore's recent Nobel Peace Prize for his work on climate change has intensified calls for drastic measures in the United States and abroad to suppress carbon emissions and to slow what he and others call 'global warming.'

His supporters propose a litany of taxes and regulations to achieve this end. But before governments reach into taxpayers' wallets to fund these proposals, they should consider a few common-sense conditions necessary for Gore's costly proposals to make sense.

The first and most obvious condition requires evidence that the climate is actually changing. This may be widely accepted, but it is important to note that the climate has changed constantly since prehistory.

If the climate is changing, we reach the second condition: For any government action to be productive, human carbon emissions must cause global warming.

According to Gore's scientific supporters, this link is proven fact. However, scientists have yet to produce a model that accurately uses carbon emissions to explain past temperature variation.

Third, even if scientists establish the causal link between carbon emissions and warming, government involvement is not justified unless the change is proven to be for the worse.

The global climate is an incredibly complex system, and any change may make the world a more hospitable or less hospitable place. The idea that halting climate change is preferable rests on the dubious condition that the global thermostat is currently set just right.

Fourth, even if scientists can show that human-caused warming will have significant net negative effects, action is only justified if that action has a good chance of stopping the change.

Oregon recently set state carbon reduction targets and plans to embark on an ambitious and expensive plan to build power plants that emit zero carbon. Even if limiting carbon emissions is the way to turn down the global thermostat, Oregon's carbon emissions are only a tiny fraction of the global total.

Oregon's actions will be expensive - but meaningless - gestures without an effective global carbon control regime.

Assembling such a regime would require us to ask the developing world to forgo the same technologies that brought us into the industrial age. We should be morally uncomfortable making this request unless gains are certain and large.

Even if Gore could assemble this regime and orchestrate a global reduction in carbon emissions, the costs of preventing climate change may be greater than the costs of adapting to climate change.

Two frequently cited negative effects of climate change are higher sea levels and the spread of tropical diseases such as malaria.

Building levees and buying DDT and malaria nets are likely to be far cheaper than forcing the wholesale abandonment of energy sources that have powered human progress since the Industrial Revolution.

Calls to action to prevent climate change are an updated and equally flawed version of political economist Friedrich Hayek's 'fatal conceit.'

The term describes the arrogance of socialists who thought that, with enough power in the hands of the right planners, men could engineer economies to greater prosperity than the supposed chaos of the free market.

But every locale in which the planners tried their system ended up in despair - hence a 'fatal' conceit. Planners could not even plan tiny Cuba out of poverty.

Today, we see planners like Gore promise that, with enough money and power, they can optimize an even more complex system: our climate.

If planners could not get Cuba's economy right, I do not think we should trust or fund big government's efforts to control our weather.

Anthony Stinton is a research associate at Cascade Policy Institute, a Portland-based public policy think tank. He also is a candidate for a master's degree in public policy at Harvard University's Kennedy School of Government.

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