Which of the following describes an aspect of urbanization that would most increase the amount of carbon dioxide released into the atmosphere compared to rural and suburban areas?
A. A greater amount of impermeable surfaces in urban areas that prevents organic material from entering soils
B. Reliance on mass transportation systems in urban areas, such as buses and trains rather than individual cars and trucks, which increases carbon dioxide release
C. Decreased square footage of living space, per person, in most housing units in urban areas that leads to an increased carbon footprint
D. Increased amounts of waste per unit area in urban areas that leads to higher rates of decay and decomposition
