Everyone is talking about this seven billion figure at the moment. Check out this website here to see what the world population was the day you were born. On the day I was born (in 1959) the global population was approximately:
The fastest growing country that year was Western Sahara.
Also check this site, especially if like me you are over fifty (scientifically inaccurate but funny).
By the way I think a grwoing populationis good news not bad and if someone reads this post in fifty years time I predict we'll be on our way to seventy billion by then and it will be quite a different world to the one we know now - a whole lot better and a whole lot worse (unless the lord comes before then, of course).