New Horizon assesses vulnerability of different regions to climate change effects . Countries with fastest growing populations most at risk from environmental impacts . Megacities in Asia and Africa most threatened including Nairobi and Addis Ababa . United Nations launch youth focus on achievement of seventh world population target .
New report assesses vulnerability of different nations to climate change effects . Areas with fastest growing populations most at risk from environmental impacts . Megacities in Asia and Africa most threatened including Calcutta and Addis Ababa . United Nations launch youth focus on eve of seventh billion population milestone .