China and India control over one-third of all the world's population.
China and India contains/takes up about one-third of the whole planet.
China and India collectively make up over one-third of the world's population, accounting for approximately 36% of around 8 billion people. China's population is about 1.4 billion, while India's population is similarly around 1.4 billion. The population growth rates for both countries have been declining in recent years, impacting global population trends.
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