Question

What are the environmental threats to historical monuments?​

Answer 1

Explanation:

The effects may be minor, such as a blackening of the surface of monuments due to dust. Other impacts can have permanent consequences. For many historians the effect of pollution on historical sites is a daily battle. Acid rain and smog eat into marble causing small holes in the stone

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Answer 2

ANSWER:-

The effects may be minor, such as a blackening of the surface of monuments due to dust. Other impacts can have permanent consequences. For many historians the effect of pollution on historical sites is a daily battle. Acid rain and smog eat into marble causing small holes in the stone.

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