What does it mean when someone says “china went from no phones to cell phones”

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 factors add to the greenhouse effect and are caused by human activities?

How much water is in the ocean in cubic kilometers