本文选自剑14TEST 1 SECTION3
介绍了城市规划中海边城市规划的问题
carla: OK Rob. I'm glad we chose quite a specific topic - cities built next to the sea.Itmade it much easier to findrelevant information.
rob: Yeah. And cities aregrowing so quickly 一 I mean, we know that more than half
the world's population lives in cities now.
carla: Yeah, though that’s allcities, not just ones on the coast. But most of the biggest
cities are actually built by the sea I'd not realisedthat before.
rob: Nor me. And what’s more, a lot of themare built at places where rivers come out
into the sea. But apparently this can be a problem.
carla: Why?
rob: Well, as the cityexpands, agriculture and industry tend to spread further inland
along the rivers, and so agriculture moves even furtherinland up the river.
That’s not necessarily a problem, except it means more and more Dollutantsdischarged into the rivers.
carla: So these are broughtdownstream to the cities?
rob: Right. Hmm. Did youread that article about Miami, on the east coast of the
USA?
CARLA： NO.
rob: Well, apparently backin the 1950s they built channels to drain away the water in
case of flooding.
carla: Sounds sensible.
rob: Yeah, they spent quite a lot of money on them. But whatthey didn't take into account was global warming. So they built the drainagechannels too close to sea level, and now sea levels are rising, they're more orless useless. If there's a lot of rain, the water canl run away, there'snowhere for it to go. The whole design was faulty.
CARLA: So what are the authorities doing about it now?
ROB： I don‘t know. I did read that they're aiming to stop disposing of waste waterinto the ocean over the next ten years.
CARLA： But that won't help with flood prevention now, will it?
ROB： No. Really, they just need to find the money for somethingto replace the drainage channels, in order to protect against flooding now. Butin the long term they need to consider the whole ecosystem.
CARLA： Right. Really, though, coastal cities can't deal with theirproblems on their own, can they? I mean, they5ve got to start acting togetherat an international level instead of just doing their own thing.
ROB： Absolutely. The thing is, everyone knows what the problemsare and environmentalists have a pretty good idea of what we should be doingabout them, so they should be able to work together to some extent.But it’s going to be a long time before countries come to a decision on whatprinciples they're prepared to abide by.
CARLA： Yes, if they ever do.
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