Manufactured compounds called <span>chlorofluorocarbons (CFCs)</span>, that were being released into the atmosphere from products that contained them ,were largely responsible for the hole that developed in the earth’s ozone layer. This is why a lot of products containing CFCs such as styrofoam and aerosoles were banned in various countries.
The know minerals mined in hollow core mining are coal, and iron. These two are the ones commonly mined in hollow core mines.
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The barnacles are only able to attach them selfs to surfaces in the water. Since the surface is limited, barnacles are attaching themselves to the other barnacles, crowding the rock. The muscles were not able to grow or attach themselves off the surface of the rock. Same thing with the mussels that are growing on the rock. So not only barnacles are crowding the rock, but Mussels as well are crowding the rock.
