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Air pollution is the introduction of airborne chemicals, particulate matter or biological materials that cause harm or discomfort to organisms. [59] The population growth , industrialization and motorization of human societies have significantly increased the amount of airborne pollutants in the Earth's atmosphere, causing noticeable problems ...
Geofoam is a polymeric product created by processing polystyrene into a foam consisting of many closed cells filled with air and/or gases. The skeletal nature of the cell walls resembles bone-structures made of the unexpanded polymeric material.
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A batch of showers and thunderstorms is all that remains of Sara, but that moisture contributed to torrential downpours along the Gulf coast of the U.S. and fueled soaking rain over the interior ...
The Federal Reserve cut its key interest rate Thursday by a quarter-point in response to the steady decline in the once-high inflation that had angered Americans and helped drive Donald Trump’s ...
The remains of a World War II airman were identified 80 years after his plane was shot down during a bombing mission in Germany, military officials said this week. In the spring of 1944, U.S. Army ...
In ancient Greek medicine, each of the four humours became associated with an element. Blood was the humor identified with air, since both were hot and wet. Other things associated with air and blood in ancient and medieval medicine included the season of spring, since it increased the qualities of heat and moisture; the sanguine temperament (of a person dominated by the blood humour ...
The Allam-Fetvedt Cycle is a recuperated, high-pressure, Brayton cycle employing a transcritical CO 2 working fluid with an oxy-fuel combustion regime. This cycle begins by burning a gaseous fuel with oxygen and a hot, high-pressure, recycled supercritical CO 2 working fluid in a combustor.