1. Some gaseous pollutants bond with water to form little droplets known as _________.
a.Rainfall
b.Water droplets
c.Pollution
d.Aerosols
2.Which size of pollution particle is most dangerous to human health?
a.Large particles (10 micrometers wide or more)
b.Medium sized particles (3-10 micrometers wide)
c.Small particles (less than 3 micrometers wide)
d.None, because pollution is not hazardous to human health
3.Which pollutants are hazardous to human health?
a.Sulfur dioxides
b.Carbon Monoxide
c.Volatile organic compounds (VOCs)
d.All of the above
