(Image: Getty) Introduction Many cities are getting hotter and hotter. This can cause many problems for the people who live in them. What can we do to make heatwaves more bearable? This week's question People in India use 'jaali' to keep their homes cool, but what is it? Is it: a) a tall house designed to reduce sunlight? b) a honeycomb pattern used in windows? or, c) a system for spraying cool water? Listen to the programme to hear the answer. Vocabulary sweatsalty water which the body passes through the skin…