Very strong acids will burn if they touch your skin and can even destroy metals. Acid rain is much, much weaker than this...As, it is never acidic enough to burn your skin. Normal rainwater has a pH of 5.6. When the pH level of rainwater goes below 5.6, it is considered acid rain.
How to reduce the damage caused by acid rain? Lakes and rivers can have powdered limestone added to them to neutralise the water - this is called "liming". Liming, however, is expensive and its effects are only temporary - it needs to be continued until the acid rain stops.

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