The Genetic Engineering Appraisal Committee (GEAC) of the Environment Ministry on October 18 cleared the proposal for the commercial cultivation of genetically modified (GM) mustard. The GM mustard variety, named Dhara Mustard Hybrid (DMH-11), has been developed by the Centre for Genetic Manipulation of Crop Plants at Delhi University. While this development has been welcomed by sections of the scientific community, it is being opposed by farmers and environmentalists. Meanwhile, the Supreme Court, in an interim order, has ordered “status quo” on the GEAC’s clearance, telling the government “Do not take any precipitative action." It has posted the matter for hearing on November 10th. In the first part of this two-part Deep Dive podcast, we take a detailed look at the history of GM Mustard in India going back to 2002, the nature of the science behind the genetic manipulation involved, and examine the basis of claims that DMH-11 is higher yielding than other options available to the Indian farmer.