Paragraph 1
The world reached a
demographic
. The US Census Bureau said the
passed 8 billion in September. However, it said this was a rough
. The exact
could be a month or two
. The world population will continue to grow
. It grew from 6 billion to 8 billion in the
two decades. The population doubled between 1960 and 2000. The
of growth is slowing because of falling
rates.