2010北师大版英语必修三 unit 7 the sea lesson 2 protecting the sea 课件

课件22张PPT。Protecting the Sea Lesson 2I am sailingDiscussion2.What do you think are the causes of
sea pollution?3.What are the solutions to the problem?1. What is sea pollution?Key words:pollute, pollution, over-fishing,
industrial waste,
agricultural waste,
plastic, oil, chemicals, rubbish, ban,
deal with a problemWhat’s the subject of zhi Hong’s
science project?What are the problems about?the first part It is about protecting the sea.First, there's . Second, there's .pollutionover-fishingthe second part What causes over-fishing?Are there more fishermen catching more fish?That's when people fish and the number of fish too low. Some fish may disappear .too muchfallsaltogetherthey hope to catch more fish, but there are less fish to catch.the third part What causes pollution?All sorts: chemicals, , , oil; most of them come from agricultural and waste. plasticrubbishindustrialWhat solutions does government do to pollution?Government departments look for ways to pollution, keep a record
of of pollution, finding where it comes from , people who have broken the law. reducelevelspunishingthe fourth partThe government tries to the number of that people can catch.
They also try to people to get other kinds of .What solutions for over-fishing?controlfish helpjobsthe fifth part1.Really?2.Do you mean3. It sounds like4. Are they?5. Yes , I suppose it must be.6. That’s a good idea!Q5Fang zhou is asking Zhi Hong about her science project.
FZ: Hey, Zhi hong, what did you do for your science project?
ZH: I did something about protecting the sea.
FZ: Protecting the sea from what?
ZH: Well, first, there's pollution. That's big problem. And second, there's over-fishing.FZ: What's over-fishing?
ZH: That's when people fish too much and the number of fish falls too low. Some fish may disappear altogether.
FZ: Really?
ZH: Yes, now there are too many fishermen fishing in the same place.
FZ: Do you mean that there are more fishermen now than there were before?
ZH: Yes, there are many more. And fishermen today have better technology so they can catch more fish than before.
FZ: So there are more fishermen catching more fish?
ZH: Well, they hope to catch more fish, but there are less fish to catch, so they simply can't.
FZ: That's bad.
ZH: Yes, ZH: Yes, and pollution is very bad,too.
FZ: What causes pollution?
ZH: All sorts: chemicals, plastic, rubbish, oil; most of them come from industrial and agricultural waste.
FZ: It sounds like a big problem.
ZH: Yes, it is a big problem.
FZ: How have these two problems been handled?
ZH: Well, some government departments are trying to deal with the situation.
FZ: Are they?
ZH: Yes, some look for ways to reduce pollution, some keep a record of levels of pollution, other departments are responsible for finding where it comes from and punishing people who have broken the law by causing pollution. Of course, often it's quite difficult to find who's responsible for pollution.
FZ: Yes, I suppose it must be.FZ: What about over-fishing? What can be done about that?
ZH: The government tries to control the number of fish that people can catch. In the worst areas they ban fishing completely for a few months at a time so that the fish numbers can grow again. They also try to help people to get other kinds of jobs so there are less people trying to make a living from fishing.
FZ: That’s a good idea!
ZH: Let’s hope it works.pollutionIndustrial waste plasticoilrubbishban