This document summarizes a public interest litigation filed by M.C. Mehta regarding air pollution around the Taj Mahal. It discusses the various reports submitted on sources of pollution like industries and refineries. The court recognized the need for sustainable development and applied the precautionary principle. It directed 292 industries to switch to natural gas and others to relocate, constituting a committee to monitor progress. Analysis shows SO2 levels reduced after the action plan. However, the petitioner notes justice was delayed as it took 16 years to fully address the issue.