This is the latest in a series on why it is important to push hard for climate legislation this year.

Over the past few months, I’ve made the case for passing climate legislation in 2008: We don’t want to squander the current momentum, we simply can’t afford to wait, and while we do, we only prolong a dangerous catch-22.

Now we’re finally on the doorstep of Senate action on a comprehensive climate change bill. Floor debate over the Climate Security Act (S. 3036) will begin Monday, June 2.

If opponents of meaningful action have their way, the debate will be nothing more than a short, partisan fight over gas prices. You can already hear the predictable scare tactics: “Why would we want to raise gas prices now, when working Americans are already suffering at the pump?”

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That’s a phony argument — but it brings me to another reason for passing a climate bill in 2008: It’s time to kick our oil habit, and the best way to do that is with a cap-and-trade policy that reduces our dependence on fossil fuels.

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Gas prices are at a record high because of growing demand from China and other developing nations. That’s not going to change. The only solution is to end our addiction to oil.

Price volatility dwarfs climate policy costs

A bevy of analyses by the Energy Information Administration, the Environmental Protection Agency, and researchers at the Massachusetts Institute of Technology have found that the overall costs to the economy from capping emissions will be very small — less than one percent of GDP twenty years from now, and less than a penny on the dollar in terms of household consumption. More on that here.

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But what do they say about gas prices? Pretty much the same: As the figure below shows, climate policy is projected to raise gasoline prices by a modest amount — 8-14 percent, or 26-40 cents per gallon. To be specific, EIA’s study of the Climate Security Act projects that an emissions cap would add about 42 cents a gallon (in 2005 terms) to the price of gasoline in 2030. That’s much less than the rise in prices in the spring of 2007, when gasoline prices soared $1.10:

average gas prices in 2030

But wait: All of these models project gasoline prices that are lower than today’s prices, in real terms — even with ambitious cuts in greenhouse-gas emissions.

That simply underscores how much volatility and uncertainty already exists in energy markets. A recurring consequence of relying on imported oil is price fluctuations due to supply bottlenecks and Mideast politics — and they dwarf the projected impacts of climate policy.

S. 3036 will help break the addiction

While the EIA, EPA, and MIT analyses predict that oil prices will return to historical levels below today’s prices, others are not so sure. Industry experts now talk of prices going beyond $4 this summer, with some analysts predicting prices as high $7 a gallon within a few years under “business as usual.”

Those projections do not consider climate policy at all. What drives their dire forecasts is the prospect of booming global demand for crude oil, especially in China and India, along with stagnant supply as existing production slows down and new production fails to keep pace.

That suggests what really need to worry about is not a predicted 40-cent increase over twenty years if we enact climate policy, but the possibility of a $4 dollar increase due to supply and demand conditions. The only way out of that fix is to reduce our dependence on hydrocarbon fuels.

S. 3036 would do just that. This last figure shows projected U.S. petroleum consumption in 2030, under the Climate Security Act and business-as-usual. The EIA and EPA analyses project only modest declines in consumption (5 to 10 percent), but the MIT numbers are eye-opening, with petroleum consumption falling nearly in half.

Under the MIT forecasts, the United States would spend $20 billion less on foreign oil in the year 2020, and $81 billion less in 2030:

petroleum consumption in 2030

By passing climate legislation this year, Congress can finally answer the American public’s call for a solution to rising gas prices and our dangerous oil addiction — instead of hiding behind phony arguments about energy costs.