In its drive for rapid economic growth, Beijing's smog, in early 2013, was far above levels considered dangerous, and citizens of the city who went outside experienced burning lungs and stinging eyes. This is an example of the debate over __________

Which of the following is home to some of the nation's wealthiest and most highly educated residents?

A. inner city B. exurbs C. first suburbs D. boomburbs

Nearly a quarter of China is made up of desert and that amount increases by 1,300 square miles each year. This is an example of

A) deforestation. B) desertification. C) global climate change. D) pollution. E) slash-and-burn.