In 2019, an international report by the Lancet Countdown declared climate change a health emergency, with "dire implications for every aspect of human life" already playing out across the globe today.
Both China and India, the world's two most populous nations, will register population peaks before 2050, following which they will post sharp declines.
A study from the Lancet points to infectious diseases, worsening air pollution, rising temperatures and even malnutrition as threats to child health as the climate changes.
