Carmakers are gearing up to launch affordable hybrid and electric cars for India in the next few years, executives said, lured by government incentives for fuel-efficient vehicles as the country accelerates efforts to cut worsening air pollution. As the industry descends on smog-bound New Delhi for India's biggest car show, starting Wednesday, foreign firms like Toyota Motor Corp will join domestic players like Tata Motors and Mahindra & Mahindra in displaying green cars designed to reel in potential buyers.