1. Acid Rain
... the level of acidity by measuring the hydrogen ion concentration, were pH 1 is the strongest acid and pH 14 is the strongest base. Acids and bases of the same amount and strength can neutralise each other. Acid rain is caused by the release of oxides of sulphur (SO2) and nitrogen (NOx) which ... when combined with the moisture in the air, may fall as rain with acidity of sulphuric or nitric acids. In Europe, the main cause of the acid ... is also potentially harmful we may breathe this in, and the moisture in our throats or lungs may turn them into acids. The problem of acid rain has b...
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