Hello. The programme you're about to listen to was first broadcast（广播） in June 2006 on the BBC Learning English website. For more English language learning programmes and podcasts, search for BBC Learning English. Hello, I'm Jacqui Dalton and you're listening to Weekender with bbclearningenglish.com Do you enjoy cycling, taking your bike out and getting some exercise or fresh air? What about cycling with absolutely（完全地） no clothes on? Well, I've never tried it myself, but hundreds of people all over the world have and they think it's lots of fun.

  This weekend, the world naked（裸体的） bike ride takes place. People in cities from Vancouver（温哥华（加拿大城市）） to London will be getting out their bicycles and taking off their clothes. The question is, why? Conrad Schmidt is the man who's linking up cyclist groups from around the world for this event. He spoke to me over the telephone from Vancouver and he's going to give us some answers. What reasons does he give for the naked bike ride?

  It's about getting a message out there that cycling is good for people and is good for the planet and that we're going to be sustainable（可以忍受的）. We're going to think about other things besides（而且prep除…之外） car culture and just making（使） a happier, healthier planet. Well, Conrad said cycling is good for people and good for the planet. He uses the word sustainable, a word we often hear in connection（连接） with the environment. It means to do things without causing damage（损害） to the environment. A nice phrase he also used was getting the message out there, which means making sure people know, or you could also say making people more aware（知道的）.

  Aware, a word that Conrad will use next when talking about climate change. Listen out for it. I know that people in London are very aware of global（全球的） warming, but believe it or not, in North America, there's still a lot of people that don't even believe it's real.