Population 7 Billion: It's Time to Talk is a project of the Global Population Speak Out (GPSO), the Population Institute, and other partnering organizations, including the Center for Biological Diversity, the Post-Carbon Institute, and the Population Media Center. Earlier GPSOs have spanned the globe, with active participants in six continents and more than 50 countries. Hundreds of noted experts, scholars, and academicians, along with environmental and reproductive health advocates have spoken out publicly about population in prior years. This year, for the fourth GPSO, we are focusing on the 7 Billion number. Why? Because as each person discovers how 7 Billion people on the planet affects their life, we hope they will share it in a global effort to better our world. Our program will be active through April 2012!