No, it's not about eco-moms.

Klaus Lackner, professor of geophysics and director of the Center for Sustainable Energy at the Columbia University Earth Institute, once said:

"Technology in general and energy at its base ultimately define the carrying capacity of the Earth for humans" . . .

Lackner and Sachs, however, see vast room for progress in meeting the world's growing energy needs without threatening to destabilize the Earth's climate. In particular, they identify carbon capture and sequestration as an important part of any future plan to address the problem.

Even better . . .

The idea is simple. Air would be blown over a liquid solution of potassium carbonate, which would absorb the carbon dioxide. The carbon dioxide would then be extracted and subjected to chemical reactions that would turn it into fuel: methanol, gasoline or jet fuel.

This process could transform carbon dioxide from an unwanted, climate-changing pollutant into a vast resource for renewable fuels. The closed cycle — equal amounts of carbon dioxide emitted and removed — would mean that cars, trucks and airplanes using the synthetic fuels would no longer be contributing to global warming.

Although they have not yet built a synthetic fuel factory, or even a small prototype, the scientists say it is all based on existing technology.

They make an analogy to biofuels which can, in theory at least, have net zero emissions since the carbon in them came from the atmosphere in the first place. However, as with biofuels, energy is needed to make the magic.

There is, however, a major caveat that explains why no one has built a carbon-dioxide-to-gasoline factory: it requires a great deal of energy.

To deal with that problem, the Los Alamos scientists say they have developed a number of innovations, including a new electrochemical process for detaching the carbon dioxide after it has been absorbed into the potassium carbonate solution. The process has been tested in Dr. Kubic’s garage, in a simple apparatus that looks like mutant Tupperware.

Even with those improvements, providing the energy to produce gasoline on a commercial scale — say, 750,000 gallons a day — would require a dedicated power plant, preferably a nuclear one, the scientists say.

The strongest argument for this technology is that no other socio-economic changes are needed to eliminate emissions.

Hydrogen-powered cars emit no carbon dioxide, but producing hydrogen, by splitting water or some other chemical reaction, requires copious energy, and if that energy comes from coal-fired power plants, then the problem has not been solved. Hydrogen is also harder to store and move than gasoline and would require an overhaul of the world’s energy infrastructure.

Electric cars also push the carbon dioxide problem to the power plant. And electric cars have typically been limited to a range of tens of miles as opposed to the hundreds of miles that can be driven on a tank of gas.

Gasoline, it turns out, is an almost ideal fuel (except that it produces 19.4 pounds of carbon dioxide per gallon). It is easily transported, and it generates more energy per volume than most alternatives. If it can be made out of carbon dioxide in the air, the Los Alamos concept may mean there is little reason to switch, after all. The concept can also be adapted for jet fuel; for jetliners, neither hydrogen nor batteries seem plausible alternatives.

“This is the only one that I have seen that addresses all of the concerns that are out there right now,” Dr. Martin said.

Too true. Things could continue as they are now but the source of hydrocarbons would no longer be from fossils.