Which is the main cause of china's water and air pollution problems?
a. overpopulation
b. global warming
c. factorys and industries
d. lack of government regulation

Who was thomas jefferson and what was his constitution toward the development of the us government

The process of rocks breaking down and becoming other rocks

Why are the majority of the world's economies mixed? what may happen to the "pure" types of economies (traditional, socialist/command, market capitalist) when they incorporate elements from other economic models?