Answer:
Explanation:
People who use marble to carve monuments and sculptures are always concerned because it can easily chemically weather.
Marble is a metamorphic rock derieved from limestone. The minerals that makes up limestone are calcite and dolomite. When a metamorphic transformation occurs, the rock is subjected to intense temperature and pressure. Marble is made of calcite and dolomite minerals.
Rain water dissolves carbon dioxide to form weak carbonic acid. This weak carbonic acid can easily dissolve marble thereby defacing the monument and the sculpture.
The people who care for monuments and sculptures made of marble are concerned about acid rain because when sulfuric acid or sulfurous reacts with calcite in marble. The calcite starts to dissolve.
Acid rain is the rainwater mixed with chemicals present in the air, like sulfuric acid and sulfur.
These acid rains fall into the ground and this chemically mixed water is very harmful to the earth.
The monuments or sculptures which are made up of marble are highly affected by acid rains.
The marble is composed of calcite and calcite when reacts with nitric acid, sulfuric acid, or sulfurous present in acid rain, it starts to get dissolve or wash off.
This highly impacts the shine and whiteness of the monuments.
Thus, that's why people are concerned about rain water.
Learn more about acid rain, here:
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