The United Nations (UN) has published its prediction about the size and age of the world’s population three hundred years from now. This report can help environmental (SCIENCE) and policy-makers to understand dramatic changes in the world’s population in the future. The report suggests that if the birth rates stay the same, there’ll be a huge expansion of the (GLOBE) population. You may think it (POSSIBLE) but three centuries from now there may be over one hundred and thirty trillion people. The report says that the world’s population is likely to be (SIGNIFICANT) older. The average age will be fifty while today it is twenty six. Almost a quarter of all the (INHABIT) of the planet will live in Africa. (RESEARCH) think that India, China and the United States will continue to be countries with the biggest population.