Which component of the MSW landfill tests and ensures that groundwater is not contaminated?

Which type of map is shown in the image

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

Which number shows the location of the united kingdom of great britain? 7 5 2 4