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DNA evidence suggests that Thomas Jefferson probably
Air Conditioners
Devices designed to remove heat and humidity from an interior space, improving comfort and air quality.
CFCs
Chlorofluorocarbons, man-made chemical compounds used in aerosols, cooling devices, and as solvents, which have been found to deplete the ozone layer.
Montreal Protocol
An international treaty designed to protect the ozone layer by phasing out the production of numerous substances believed to be responsible for ozone depletion.
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Q89: In the late eighteenth century, what did