Today's report looks at a recent United Nations announcement that the world's population has reached 7 billion. Which countries have the highest populations? Where in the world is population growth slowing down? What are the problems associated with high population growth? And with low growth? The first activity prepares you for some of the words you will hear in the report. The second, a listening activity, invites you to choose answers to multiple-choice questions. Further activities develop your use of the vocabulary and expressions from the report.