Population unit

New unit!!! Hooray, I got an A on the test so I'm pretty happy even though I wont be able to get an A in this class since I have an 87.2%. The new unit on population does look interesting nevertheless. We have 7.5 billion people in this world which is crazy to think about because we gain 2.5 people every second. That is just absurd. Also now about every 12 years we gain a billion people meaning by around 2023 we will hit 8 billion people on planet Earth. Other crazy statistics are in the U.S. one person is born every 8 seconds. One person dies every 12 seconds. And one person enters the country every 29 seconds so we have about 1 more person every 13 seconds.