1. Sometimes the atmosphere’s temperature doesn’t decrease with altitude in a normal way. Instead, warmer air sits on top of colder air in a temperature inversion. What effect can this have on local...

1. Sometimes the atmosphere’s temperature doesn’t decrease with altitude in a normal way. Instead, warmer air sits on top of colder air in a temperature inversion. What effect can this have on local air pollution?

2. Clouds are made of tiny water droplets or ice crystals. These are heavier than air, so why don’t clouds fall to the ground?