OCCUPATION: Tata Motors chairman
PREVIOUS APPEARANCES ON THE TIME 100: 1
PRO: Last year, he introduced the Tata Nano, the world's first $2,500 car. Set for release in India this spring, the "people's car" could be a boon for low-income communities.
CON: Its low price could make the cars too accessible, flooding streets with even more CO2-spouting vehicles.