sábado, 23 de abril de 2011

Black Carbon -- Changing Planet

Black Carbon -- Changing Planet
Fri, 22 Apr 2011 05:04:58 -0500
Smog over city skyline and words Black Carbon
Black Carbon





Black carbon, composed of tiny particles of soot, is produced whenever organic substances like fossil fuels, firewood or coal is incompletely burned. These particles are polluting the air and causing serious health and environmental concerns for people around the world.



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Provided by National Science Foundation