Question

Airborne mercury has received special attention because it is a widespread and persistent neurotoxin(a substance that damages the brain and nervous system). Minute doses can cause nerve damage and other impairments, especially in young children and developing fetuses. The majority of airborne mercury is released by __________.
A. Metal ore smelting
B. Coal-burning power plants
C. Waste combustion
D. Nuclear Power plants
E. Wood-burning power plants

Answer 1

B) option is correct

Explanation:

• Coal-burning plants produce electricity by burning coal in a boiler to produce steam and the steam produced, under tremendous pressure, flows into a turbine, which spins a generator to create electricity
• The steam is then cooled, condensed back into water and returned to the boiler to start the process over
• Mercury releases to land and water from coal-burning power plants, as well as coal washing
• Coal contains only low concentrations of mercury but it is burnt in very large volumes
• Up to 95% of mercury releases from power plants can be reduced by improving coal and plant performances and by optimizing control systems for other pollutants