India's Population to Surpass China's Soon: Experts Predict.

India is set to surpass China as the world's most populous nation, but demographers are unsure exactly when it will happen due to the use of estimates. Both countries have over 1.4 billion people, making up more than a third of the world's population. Mathematical calculations suggest India will overtake China in the middle of April, but demographers warn that the numbers are fuzzy and could be revised. The shift is due to a drop in China's fertility rate, while India has a younger population and higher fertility rate. The change has social and economic consequences for both countries.