Now that's porous

Technology Review: A Better Way to Capture Carbon

Very early days, but a new material shows promise for catching CO2 economically out of exhaust gases.

This sounds hard to be believe:

The new materials absorb carbon dioxide in part because they're extremely porous, which gives them a high surface area that can come into contact with carbon dioxide molecules. The most porous of the materials that Yaghi reports in Science contain nearly 2,000 square meters of surface area packed into one gram of material. One liter of one of Yaghi's materials can store all of the molecules of carbon dioxide that, at zero °C and at ambient pressure, would take up a volume of 82.6 liters.