Question

cooling towers such as these are the most obvious part of a nuclear power plant. what substance is emitted from them? mercury vapor steam carbon monoxide sulfur dioxide

Explanation:

Cooling towers in nuclear power plants are used to dissipate heat. Water is heated in the plant's processes and turned into steam. The steam is then cooled in the cooling towers, and the visible plume coming out is steam. Nuclear power plants do not emit significant amounts of mercury vapor, carbon - monoxide, or sulfur dioxide from cooling towers.

Answer:

steam