The leading cause of air pollution in LDCs is:

In a progressive tax system which of the following is true?

a. The tax rate increases as income increases. b. A higher burden is placed on the poor than on the wealthy. c. The funds are typically used only during emergencies. d. The collected tax is typically set aside for the Rainy Day Fund.

Two countries, even allies, seldom have identical national interests. The best one can hope for is that their interests will be __________

A) parallel B) complementary C) similar D) compatible