Mains Focus WHAT ARE THE FLUE GAS DESULPHURATION UNITS "In December 2015 the Ministry of Environment, Forest and Climate Change (MoEFCC) tightened emission norms for all 537 coal-fired thermal power plants and made installation of FGD systems mandatory. Compliance has remained abysmally low (only 39 units commissioned by August 2024), and a high-level committee chaired by Principal Scientific Adviser (PSA) Ajay Sood (April 2025 study; June 2025 media reports) has advised rolling back the blanket mandate, citing cost, limited SO₂ benefit, and grid reliability arguments." https://blog.lukmaanias.com/2025/06/16/what-are-the-flue-gas-desulphuration-units/ ..