For some time now, the UN has estimated that today, October 31, the world’s population is set to reach 7 billion. That’s a big number, but what does this mean for all of us? How much do we really know about how the rest of the world lives? If you’re asking yourself these questions, start here: 7 things you should know… 1. The highest rates of population growth are in less developed countries. Too many people are born in poverty and live out their days with little hope for better lives. 2. Good news! In developing regions, the number of people living on less than $1.25 a day dropped from 46 percent to 27 percent from 1990 to 2005. Even...