An Indian boy has won the world's largest pre-college science competition in the US in the environmental engineering category for his project on biodegradation of pesticides. <br/><br/>Prashant Ranganathan, a 12th grader from Jamshedpur, alongwith over 20 high school students from various parts of India, participated in the Intel International Science and Engineering Fair. <br/><br/>He said, his project will actually help farmers in biodegrading the pesticide which is plaguing the country. Four Indian-Americans received top awards in various categories. <br/><br/>Over 1700 students from across the world participated in the week-long event which concluded in Washington yesterday.<br/>