What is a "heat island"? Causes and effects.

What was the most difficult obstacle to overcome in the creation of an autonomous state after indian independence was achieved? a british willingness to go to war to retain the region b. religious differences between hindus and muslims c. ethnic differences between tribal regions d. indian princes' inability to decide on a format of government

Which of the following terms describes the layers of air surrounding the earth ?

In russia which of these challenges affects the transportation of both petroleum products and other goods?