<h1>Air purifiers: court urged temporary GST exemption and reclassification as medical devices amid severe air pollution.</h1> A PIL seeks classification of air purifiers as medical devices and reduction of the Goods and Services Tax from 18% to five per cent, contending high taxation makes essential indoor-air devices financially inaccessible and imposes an arbitrary health burden. The Delhi High Court expressed displeasure at lack of administrative action in the current emergency of very poor air quality, directed authorities to take instructions, and urged consideration of temporary exemption or short-term relief to secure access to clean air.