An aerosol is

A. A rigidly defined chemical composition
B. Not considered as hazardous to human health as other air pollutants
C. Not as apparent in the air as other air pollutants
D. Any liquid droplet or solid particle suspended in air
E. A chemical propellant


Answer: D

Environmental & Atmospheric Sciences

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Which nation below has the highest life expectancy at birth in South Asia?

A) Nepal B) Bangladesh C) Sri Lanka D) Pakistan E) India

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Which of the following minerals does NOT commonly occur in green color?

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Environmental & Atmospheric Sciences