What is an effect of excessive amounts of cfc's released into the air?

Exactly what kind of weather conditions would a cold front produce?

List 3 factors commonly used to select the location of a city

Which of these is a drawback of using natural gas? a. it is fairly safe for use in homes.b. it burns more cleanly than crude oil products.c. scientists have developed new ways of extracting it.d. during its extraction, groundwater can be contaminated.