what are they?

Submarine noise causes noise pollution and is from a source of annoyance to any person. We should avoid, minimize and control the cause of noise to our environmental impact.
Busy traffic causes air and noise pollution and now in Hong Kong, we encourage the drivers use Ultra low sulphur diesel for their traffic plant in order to reduce the emission of dark smoke with toxic particles.
Rubbish is the solid wate and can be classified as municipal solid waste. The MSW is disposed of at landfills.