Unfortunately, mankind's industrial progress has not been very beneficial to the other lives that share the planet with him. Plants are very sensitive to sulphur dioxide, fluorine compounds, smog etc. Spotting and burning of leaves, destruction of crops, and retarded growth of plants have been observed. Flourides are very toxic to animals. Cattle suffer by eating foliage contaminated with fluorides.
Buildings get grimy.
Your white clothes don't remain white if you travel in open vehicles in any Indian metro. There is always a bad odour hanging in the air. Prevention and Control Check it at source. There should be a check on releasing toxic substances in the air. Arrestors are available to contain pollution for many kinds of machinery and processes.