AP BIOLOGY

ECOLOGY

CHEMICAL CYCLES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
One of the environmental problems associated with the burning of coal to produce electrical energy is
A
denitrification of nitrate, releasing nitrogen gas into the atmosphere.
B
acid deposition.
C
chemical precipitation of phosphates in aquatic ecosystems.
D
ammonification.
Explanation: 

Detailed explanation-1: -Unfortunately, power plants also produce large amounts of nitrogen oxides and sulfur dioxide-the pollutants that cause acid rain-when they burn fossil fuels, especially coal, to produce energy.

Detailed explanation-2: -Coal impacts: air pollution When coal is burned it releases a number of airborne toxins and pollutants. They include mercury, lead, sulfur dioxide, nitrogen oxides, particulates, and various other heavy metals.

Detailed explanation-3: -Coal plants are the nation’s top source of carbon dioxide emissions, the primary cause of global warming. Burning coal is also a leading cause of smog, ash, acid rain, and toxic air pollution.

Detailed explanation-4: -Soils have become more acidic and less fertile, and forests in many areas are showing signs of acidification-related stress. The acidification of surface waters can lead to declines in the fish population.

Detailed explanation-5: -When coal is burned the sulfur combines with oxygen and the sulfur oxides are released to the atmosphere. Sulfur dioxide (SO2) becomes sulfur trioxide (SO3) when reacting with oxygen in the air. This reacts with water molecules in the atmosphere to form sulfuric acid, a strong mineral acid. This makes rain acidic.

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