Health officials in the Indian state of Rajasthan are launching a new campaign to try reduce the high population growth in the area.
They are encouraging men and women to volunteer for sterilisation, and in return are offering a car and other prizes for those who come forward.
Among the rewards on offer is the Indian-made Tata Nano – the world’s cheapest car.
Many in the government are worried about the size of India’s population.
It is expected to overtake that of China by 2030.