Not long ago, the phrase “clean coal” seemed like an oxymoron. Coal-fired power plants emit a witch’s brew of air pollutants that, unless it is removed with scrubbers, tarnishes the air, creates acid ...

Biodesulfurization of coal is an emerging clean technology that employs specialised microorganisms to remove sulphur compounds, particularly pyritic sulphur, from coal. This process not only mitigates ...