1
the result of economic activity is dispersed into the atmosphere
2
the level of the stratosphere whose basic function is to filter out the Suns harmful ultraviolet rays
3
is primarily caused by the use of fossil fuels, transport and domestic heating
4
precipitation in the form of rain containing pollute water is a global problem
5
a gas found in a layer of the Earths atmosphere
6
fog and smoke; a cloud of dirty air often found in city
