Not a great deal because the main fuels are hydrogen and oxygen, so the exhaust is merely water-vapour. Solid propellants will produce other gases that may be polluting, but the number of launches world-wide, and the individual volumes of gas, are very small compared to anything else.
Alot
*aeroplanes
Electromagnetic waves only cause sound pollution because they are sound waves.
Talking too much could be considered noise pollution, but that's about it.
None.
Automobiles, burning of matter and using of natural resources at an exploiting level cause much pollution.
If you put pollution in a box it is 2 litres
Heck No. In fact, chemicals make land pollution much, much worse and can cause many diseases.
Reducing air pollution is to cause a reduction in how polluted the air is. That shouldn't take much to work out.
not much
Too much air pollution can cause bad weather and sicknesses and/or deaths of many species!
Air pollution doesn't have a "cost." But it does cause Global Warming and the atmosphere getting "clogged up" so to speak.