Atropical storm watch means tropical storm-force winds are:
a. expected within 36 hours
b. expected within 48 hours
c. possible within 36 hours
d. possible within 48 hours

Air pollution: “combustion results in gases such as nitrogen oxides, nitrogen dioxide and particulates. the main causes of air pollution include transport, domestic combustion and industrial processes. pollutants from these sources can cause problems in the immediate vicinity and a distance away.”

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Anstobacco uses;