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World population at 8 billion — by the numbers

World population at 8 billion — by the numbers

People are living longer and healthier lives, but huge geographic inequalities remain.

It’s getting crowded in here.

Last month, the global population reached 8 billion for the first time, according to the United Nations. While the number of humans on the planet is expected to keep growing — peaking at around 10.4 billion by the end of the century — its demographic profile is changing. Fertility rates are gradually decreasing and several countries — most of them in Europe and Southeast Asia — will experience population declines in the next 30 years.

Thanks to better health care and improving economic conditions, people across the planet now live longer and healthier lives, though significant regional inequalities still exist.

Greater life expectancy, combined with lower fertility rates, also means that the world’s population is aging. The old-age dependency ratio — the number of people over 65 as a share of the working-age population — is projected to double in the next 30 years. This means the working-age population will need to sustain a growing number of retired people — a big challenge for social security, pension and health care systems.


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