So it's not exactly "real time," but it's fairly close, according to BusinessGreen. The amount of greenhouse gases, now thrown in our faces by this giant glowing billboard, is rising by about 800 tonnes per second, which doesn't mean much to me but certainly sounds like a large number. You can also download a widget in case you don't walk by the billboard itself too often but still want to see a big number slowly increasing. [Treehugger]