Make Your Own Air Quality Indicator
by Lloyd Alter, Toronto 
on 09.18.05
Should you go for a run or hold your breath? This device takes air quality data from the internet and graphically shows air quality with LED displays. The designers hope it will be installed in public areas to encourage people to reduce pollution. Not only that, but they have made it open-source, providing complete instructions and programming. ::Air Quality Indicator via ::WMMNA
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