To restore acid rain to its natural pH, Sulphur should be present in lower proportions in the atmosphere. Sulphur dioxide emissions mixed with nitrogen oxide emissions cause acid rain.
Both substances interact with airborne molecules including water, oxygen, and other molecules to produce this effect. Particularly when it comes to aquatic life, this phenomena is exceedingly hazardous for both people and other animals and plants. For example, the elevated pH prevents several kinds of freshwater fish from developing or growing. When the pH is even lower, however, in some situations, the organisms are unable to survive and eventually perish. Therefore, a decrease in atmospheric Sulphur concentrations could lessen acid rain and bring rain back to its normal pH in the atmosphere.
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