Chemistry
Black lung disease occurs in people working in

Organic solvents industry
Coal mines
Paint manufacturing industry
Electroplating industry

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Chemistry
What are the components responsible for acid rain?

Oxides of carbon (COx) and Oxides of nitrogen (NOx)
Sulphur dioxide (SO2) and Nitrogen oxides (NOx)
Nitrogen monoxide (NO) and Carbon monoxide (CO)
Carbon dioxide (CO2) and Carbon monoxide (CO)

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