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The demand for a good or service reulting from or leads to the demand for another good or service. 

Limesone is a calcium carbonate and when rainwater mixes with carbon dioxide in the atmosphere it becomes weak carbonic acid.  Calcium carbonate is soluble in this acid and thus causing the process of ...

Varies reasons inclusing:

Population density - more people menas more people get affected

Infrastructure - more built up menas more buildings will be affected and can collap...

Red blood cells are vital for us to stay alive as they carry out an extremely important role in our body - oxygen transport. Red blood cells are the carrier of oxygen around our body in the blood strea...

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