Abrownfield is an urban area of

a. vacant house lots that are overgrown with weeds and vegetation
b. parking lot pavement that collects heat during the day and emits heat at night
c. meadows that are earmarked for industrial development
d. sports arenas for baseball, football, and soccer
e. abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.

E. abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.

Explanation:

A brownfield refers to a land that was used in the past for industrial or commercial activities which is not currently being used and that can be contaminated. According to this, the answer is that a brownfield is an urban area of abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.

E. abandoned, vacant factories, warehouses, and residential sites that may be contaminated from past uses.

Explanation:

Brownfield is a land previously developed either used for industrial or commercial purposes that may be potentially contaminated.

The graph labeled aggregate emissions shows that pollution control methods are having a positive effect in the United States. The proof is a decreasing trend in this graph, with the percentage drop over this period reaching -63 %