Every time you send out 140 characters over the social application Twitter, how much energy does that consume? According to some back of the napkin calculationsfrom Raffi Krikorian, a developer for Twitter’s Platform Team, each tweet sent consumes about 90 joules. That means each tweet emits about 0.02 grams of C02 into the atmosphere.
That’s actually not bad at all — in comparison one Google search query has been found to consume about 1 kilojoule per query, which emits 0.2 grams of CO2. And according to a recent study each spam email message emits 0.3 grams of carbon.
However the research does remind us that IT takes energy to run and the energy consumption — and carbon emissions — footprint of IT is just growing bigger every day. For example, Greenpeace recently put out a reportthat said that the energy consumption and carbon emissions of cloud computing are already significantly higher than previously thought. Folks in the developer community like Krikorian are acknowledging the problem, and as he says in the video clip: “We can do better.”
Source : http://earth2tech.com/