The World Population about to pass 7 billion mark

In the next year we will pass the 7 billion mark in terms of world population.  At the current pace we will pass 10 billion people within roughly 30 years.  This will have profound impact on the world's food and energy supply and will reshape global politics.  The UN has set up a interactive website to access global demographic data.  What do you think the impact of this growth will be on our world?