One of these algae lamps can absorb up to 1 ton of CO2 a year and 150-200 times more than a tree. These would greatly help clean the air in urban areas and although prevention is better than cure, these lamps are better than nothing. Please view the folloing link for more information: http://www.treehugger.com/urban-design/microalgae-lamp-absorbs-150-200-t...
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