A Feb. 22 Facebook post (direct link, archive link) shows an image of a woman's face and scribbled mathematical formulas. "Trying to understand why a train was carrying over 300,000 gallons of a ...
In 1974, the Consumer Product Safety Commission banned the use of vinyl chloride in aerosols. It is still used primarily to produce polyvinyl chloride, or PVC, one of the most widely produced plastics ...
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