School classroom air may be more polluted with ultrafine particles than outdoor air
Dec 22, 2009 |
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The air in some school classrooms may contain higher levels of extremely small particles of pollutants — easily inhaled deep into the lungs — than polluted outdoor air, scientists in Australia and Germany ...
Feds mull regulating drugs in water
Dec 22, 2009 |
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(AP) -- Federal regulators under President Barack Obama have sharply shifted course on long-standing policy toward pharmaceutical residues in the nation's drinking water, taking a critical first step toward regulating some ...
