Using language three, listen again and take notes on what the expert said, then summarize the information you got from the interview. Good morning, listeners. Air pollution is a serious problem with urban populations, particularly at risk from smog. Ben drake is an expert on air pollution, and he is joining us today to talk about this issue. Then where does the word smog come from? Smog comes from a combination of the words smoke and fog. IT originated in britain in the early twenty eth century when smog was a severe problem. Why is IT so bad then? Well. britain was one of the first industrial countries, and factories and homes used lots of coal when burnt. The coal produced harmful emissions, which created lots of smog in london. They also called the smog a pea soup, because IT was a thicker st soup. That sounds terrible. What problems did IT cause? Smog caused many health issues and killed many people. The worst case happened in london in one thousand hundred and fifty two. Over a few days when the smog was particularly bad, four thousand deaths were recorded. IT was necessary to take immediate attention. The U. K. Government ordered people not to burn coal in their homes and forced factories to move away from city centres. But smug is still an important issue in many places. What can be done about IT smog . is harmful to everyone, especially to children, old people and those with heart, lung problems. We have to reduce smog and improve quality for everyone's health and well being. We should replace coal with clean the forms of energy, and we need to use new energy efficient vehicles. We have the technology, but we must use and develop IT. Yes, let's hope we can make some big changes. Thanks, fan. Thank you.