The merits of Flue Gas Desulphurisation (FGD) are multifold.First, it cuts air pollution to a large extent. When sulphur dioxide is removed from the smoke coming out of a plant's chimney, the resulting emissions then will not cause acid rain as easily. Acid rain in turn can be very destructive to ecosystems and infrastructure. Secondly, an FGD system enables power stations to meet increasingly stringent environmental standards, avoiding sanctions and making a positive impact on generation reputation. Thirdly, selling gypsum as a by-product offers additional sources of revenue. Moreover, FGD systems are beneficial to public health because they reduce the number of fine smoke particles inhaled by people - which can lead to lung illnesses such as industrial bronchitis and asthma. Lastly, investing in FGD technology ensures the future of a power plant and its continued operation in terms that are increasingly sustainable worldwide.