Teamprature affecting floura and fauna

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

The ozone hole is at its biggest each year in the ? hemisphere in the ? season.

The separation of northern ireland from the republic of ireland is an example of