What marine resource has been rendered uneconomical due to the cost of excavation?
A) Magnesium compounds
B) Manganese nodules
C) Sand and gravel
D) Salt
B
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Fog can form through each of the following ways except
A) by increasing the moisture content until vapor pressure reaches the water-vapor capacity. B) by decreasing the moisture content of the air and increasing temperature. C) by cooling the air until it reaches the dew-point (or frost-point) temperature. D) by a combination of cooling and increasing humidity.
During what geological period was the sandstone deposited?
What will be an ideal response?
Most of the solid waste generated in the United States is municipal solid waste.
Answer the following statement true (T) or false (F)
Groundwater pollution is better alleviated by prevention than by treatment
Indicate whether the statement is true or false