Most of us have heard of the hype about how a black screen can help reduce energy costs by a significant bit as it theoretically requires less energy to produce a black screen as compared to a lighter coloured screen.

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Researchers unveil a more efficient way to wash the air clean of carbon dioxide

Their system is a kind of air scrubbing tower, which takes air and reacts the CO2 out of it by exposing it, in this case, to sodium hydroxide. Then the stuff goes through a few chemical intermediaries eventually leaving separated CO2 that can be piped away, and more hydroxide to feed back into the scrubber.

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Soon tracking your carbon footprint will require nothing more than a software installation on your cell phone. Developed at start-up company Carbon Hero in London, the software Carbon Diem takes advantage of global positioning satellites (GPS) to figure out automatically what transportation you are using, and, based on that deduction, calculate your up-to-the-minute carbon impact.  The company's chief executive Andreas Zachariah, who is also a student at London's Royal College of Art, came up with the idea after he got tired of calculating his own carbon usage manually through various online calculators.

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