dust on electronics

green soil black sand food photograph dust layer electric socket electronic devices dusty environment electronics dusty dust-layer cable socket connector maintenance unmaintenanced electronic wire green grey dust dust-puddle environment polluted-air unhealthy-place short-circuit inside- dirty service semiconductor transformator electric feather industry dustwatch air-filter dust-cause breathing lung particle moisture carbon-tracking allergies electronic-products flooring quality- -air working sand machine components background respiratory diases air air-filter