[OC] It took 200,000 years for the World population to reach 1 billion people by the year 1800. It has only taken 221 years to grow to nearly 8 billion. This is the current growth in "real time":
from /r/dataisbeautiful
[OC]世界人口花了20萬年纔在1800年達到10億人。只用了221年就增長到近80億。這就是目前 "實時 "的增長。