highly educated middle class
Sinkholes are common where the rock below the land surface is limestone, carbonate rock, salt beds, or rocks that can naturally be dissolved by groundwater circulating through them. As the rock dissolves, spaces and caverns develop underground.
Sinkholes are formed when the land surface above collapses or sinks into the cavities or when surface material is carried downward into the voids. Drought, along with resulting high groundwater withdrawals, can make conditions favorable for sinkholes to form.
Answer: Tokyo, Japan
south china sea
Sukhbaatar, Mongolia
Philippine Sea
South Pyongan, North Korea
Answer:
C is correct
Explanation:
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This is True because both saltwater and freshwater have natural carbon dioxide.