News tagged with concentration

Drainage ditches can help clean up field runoff

Vegetated drainage ditches can help capture pesticide and nutrient loads in field runoff, U.S. Department of Agriculture (USDA) scientists report. These ditches—as common in the country as the fields they ...

Jan 04, 2013
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A layer of cool, healthy air

Stratum ventilation systems have been touted as a much more energy efficient system for cooling buildings such as school rooms and offices in hotter climes based on the provisions of the recent ANSI/ASHRAE 55-2010. They may ...

Dec 17, 2012
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ONR, marines eye solar energy

The Office of Naval Research (ONR) is looking to the sun for energy in an effort to help Marines do away with diesel-guzzling generators now used in combat outposts, officials announced Nov. 29.

Nov 29, 2012
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