Mil Konik
Mil Konik voted up Shen Mark's answer

The most immediate impact of aircraft is noise - whether it is the regular rumble of international jets or the buzz of microlights and light aircraft on sunny afternoons. The noise from airborne aircraft is related to air speed. Any fast-moving components, such as propellers and compressor blades, generate noise, as do the exhaust gases … Read more

Mil Konik
Mil Konik voted up Kalpa Perera's answer
A piston engined aircraft pollute the environment as same as a small car does. Aircraft's with jet turbo engines (turbo shaft, turbo prop, turbo jet) they do much less pollution compared to the amount of work it does. Both pollute the environment by burning fossil fuels. The total carbon emission by this aviation industry is … Read more