With the world’s population slated to top the milestone seven billion mark by late 2011, the new head of the United Nations agency that helps countries use population data for policies to reduce poverty pledged today to focus on the largest global youth generation ever. 'Investing in youth, their reproductive health and gender equality can help put countries on a path to accelerated economic growth and equitable development,' UN Population Fund (UNFPA) Executive Director Babatunde Osotimehin said in his first address to the UN Development Programme (UNDP)/UNFPA Executive Board.