Question

how are power generating plants and transport a big sources of environmental pollution​

Answer 1

Electricity generation produces a large share of Canadian nitrogen oxides and sulfur dioxide emissions, which contribute to smog and acid rain and the formation of fine particulate matter. ... Fossil fuel-fired electric power plants also emit carbon dioxide, which may contribute to climate change.

Answer 2

Thermal power plants are known to pump out a lot of greenhouse gases and ash, which are by-products of burning the fossil fuels. Whilst some thermal power plants do use solar or nuclear energy, they are heavily reliant on fossil fuels.