According to the Environmental Protection Agency (EPA), which one of the following is the largest source of sulphur dioxide emissions?

 (a). Locomotives using fossil fuels

 (b). Ships using fossil fuels

 (c). Extraction of metals from ores

 (d). Power plants using fossil fuels



Explanation: 

According to the Environmental Protection Agency (EPA), the largest source of sulfur dioxide (SO2) emissions comes from the burning of fossil fuels by power plants and other industrial facilities [EPA: Sulfur Dioxide Basics]. While locomotives, ships, and metal extraction also contribute to SO2 emissions, they are considered smaller sources compared to power plants.

The correct statement is (d) : Power plants using fossil fuels


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