Unit 5, the ABC of Ecology.0:01
Listen to the dialogue and complete the sentences in your workbook.0:07
Brian, dear, I want to say how much I've enjoyed your presentation today.0:12
Are you really so much interested in ecology?0:18
The more I study the subject, the more interested I get.0:23
Okay, but why the ecology of the oceans, the world Oceans still keep their mysteries from us and they are very important for the future of the planet.0:27
What mysteries are you talking about?0:38
Let me give you an example.0:41
What do you know about the blue whale?0:42
I've never heard of it.0:46
This animal was named so for its bluish gray color.0:50
It looks blue under the water and grey on the surface.0:54
So what is so special about this species?0:59
It's the largest animal that has lived on our planet.1:02
Its heart is as large as a car.1:06
Its tongue alone can weigh as much as an elephant.1:08
Blue whales can talk with each other and their calls are really loud.1:16
They are among the world's longest lived animals.1:21
They can live to be about 110 years old.1:24
You seem to know so much about the blue whale, but why have you decided to choose them?1:29
They are one of the most endangered species in the world.1:34
Only a few thousand blue whales swim in the world's oceans.1:37
People have hunted them for many years and now they are nearly extinct.1:41
Some time ago, the blue whale became a protected species.1:46
Today they seem to be growing in numbers.1:49
But scientists say they're not out of danger yet.1:55
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