Anonerosional boundary between two layerof sedimentary rock is called?

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

Write a short paragraph of about 150-300 words. explain how the physical environment can limit human activities.

Eastern europe and parts of northern europe have which of the following climates?