Consider the following statements regarding Flue Gas Desulphurisation (FGD) systems:

1. FGD systems are used to remove sulfur dioxide (SO₂) from power plant emissions by converting it into a stable solid using chemical absorbents.

2. Among various desulphurisation techniques, wet scrubbing using limestone slurry is the most frequently adopted process in large-scale thermal power plants.

3. Fossil fuels like coal and oil generally contain sulfur, which is released into the atmosphere during combustion.

Which of the statements given above is/are correct?