The U.N. report says much of the growth expected between now and 2050 is coming from just eight countries.
on Tuesday, according to a United Nations projection, with much of the growth coming from developing nations in Africa.
The U.N.'s Day of 8 Billion milestone Tuesday is more symbolic than precise, officials are careful to note in a wide-ranging report released over the summer that makes some staggering projections. It projected the world's population will reach around 8.5 billion in 2030, 9.7 billion in 2050 and 10.4 billion in 2100.
"There is also a greater pressure on the environment, increasing the challenges to food security that is also compounded by climate change," said Dr. Srinath Reddy, president of the Public Health Foundation of India. "Reducing inequality while focusing on adapting and mitigating climate change should be where our policy makers’ focus should be."
Families become larger when women start having children early, and 4 out of 10 girls in Africa marry before they turn 18, according to U.N. figures. The rate of teen pregnancy on the continent is the highest in the world — about half of the children born last year to mothers under 20 worldwide were in sub-Saharan Africa.
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