<br/>The Chief Election Commissioner, Mr Navin Chawla has said that the biggest challenge before the Commission is to ensure greater participation of voters in urban centres in the democratic exercise.<br/><br/>In an exclusive interview to All India Radio today, Mr Chawla expressed dismay at the low voter turn out in the 2009 general elections in Mumbai.<br/><br/>He said that the Commission is facing manifold challenges with increase in the number of political parties and the rise in literacy level. The full interview can be heard in the programme spotlight tonight at 9.15pm.