Current population gain is 78 million people per year, or 214 000 /day = 8 904 /hour.
It is predicted that world population will level off at about 10 Billion.
In next 30 years humans will need as much food and fiber as they used in last 10 000 yrs.
Our challenge is to produce and distribute enough food, energy and necessities for all, without ruining the resources used to produce them.