N28 : Twenty-eighth lesson T01 : Big cities attract millions of people and engulf the countryside around them. T02 : It's hard to escape from a city. T03 : City dwellers often finish by travelling for three hours a day just to reach work. T04 : And when the smog is bad they can't even identify the buildings around them. T05 : Scientists and city managers try to find ideas to improve urban life. T06 : The best idea, they say, is to build cities in the country.