The Doon School man who cut his teeth in the Union government as minister of environment and forests in 1991 is a transformed man these days. Made to plunge into the latest round of wto talks less than two months after he was sworn in as minister of commerce and industry, Kamal Nath has already earned the reputation of being a tough wto negotiator. "He is quick on the uptake and knows exactly which points to pick up," his officials discovered soon after he took over. The tough Kamal Nath, in full control of his political minefield of a ministry, speaks to Sheela Reddy. Excerpts: