The already heated debate about genetically modified (GM) foods in India has intensified thanks to a dramatic change in stance by environmentalist and author Mark Lynas,who now says GM crops are the answer to global food security. While India awaits two crucial reports on the topic, we interviewed Lynas and noted ecologist Vandana Shiva (who remains anti-GM foods and has borne the brunt of Lynas’s attack) to see what they have to say. Excerpts: