POLLUTANTS AND THEIR EFFECTS ON ENVIRONMENT
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When rain falls through polluted air, it comes across chemicals such as oxides of sulphur and nitrogen. These chemicals interact with……
Coal is a blackish, complex mixture of compounds of carbon, hydrogen and oxygen. It also consist small amounts of nitrogen and sulphur……
MINERALS There are big dump of minerals originate in Pakistan. These minerals are very significant for industries, as in this current……