Which of the following startling facts or statistics is not appropriate in this introduction to the thesis “cities have a dark side”?Cities have a dark side. Cities take up just ①three percent of the world's surface area, but they account for more than ②75 percent of our energy consumption, and they emit ③80 percent of our greenhouse gases. Nearly ④92 percent of the inventions are made in cities.
A: ①
B: ②
C: ③
D: ④