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(1)The Secret Language of Dolphins.
A mother dolphin talks to her baby ... by telephone!
The special call was made in an aquarium in hawaii,where the mother and her two-year-old baby swam in sepatetanks.
"It seemed clear that they knew who they were talking to,"says Don White.
But what did they say?
scientists are studying dolphins all over the world to understand their secret language.
They don't understand everything yet, but they're listening .... and learning.
Scientists think dolphins talk about everything, even such things as their age and how they are feeling.
Scientists think that dolphins say things like "there are some good fish over here," or "watch out for that shark because he's hunting."
"Sometimes one dolphin will speak and then another will seem to answer,"says Sara Waller, who studies bottlenose dolphins off the California coast.
Sometimes they all talk at the same time-like people at a party.
It is difficult to study dolphin speak in the sea because dolphins swim very quickly.
Also, it seems that one sound can mean many different things.
For example, when they are fighting, dolphins clap their mouths to say "go away!"
But they make the same sound when they are playing.
It's like humans.
When you raise a hand, it might mean hello, good-bye, or stop.
Scientists still don't understand everything dolphins say but one day, who knows, maybe you'll get a phone call from a dolphin.
(2)Future Energy where will we get our energy?
It's a bright sunny day.
I put the last solar panel on my roof, I switch t on , and I have electicity.
I'm free! Now, I won't have to worry about electric bills or oil prices, and I won't feel guilty about pollution.
But what's this?
A cloud passes in front of the aun and my lights go out!
I'm going to have to start my generator and burn some more gasoline.
This isn't going to be easy after all.
We are going to have a big energy problem in the future.
Today, the world uses 320 billion kilowatt-hours of energy a day.
That's equal to about 22 light bulbs burning nonstop for every person on the planet.
By 2100 we will use three times as much energy.
How will we get the energy?
At the moment, we get most of our energy from fossil fuels: coal, oil, and natural gas.
But fossil fuels are dirty and they will not last forever.
It the long term, we will have to find alternativas.
We will need renewable energy.
SOLAR POWER
On a cloudy day near the city of Leipzig in the former East Germany, I walked across a field with 33,500 solar panels.
It produces enough energy for 1800 homes.
One problem with solar power is that it is expensive, but the cost of solar will fall as technology improves.
"Thirty years ago it was cost- effective on satellites," says Daniel Shugar, president of Powerloght Corporation.
"Today it can be cost-effectinve for powering houses and businesses."
He tells us that in the future most houses will have solar panels.
There are other problems with solar power.
It needs a lot of space and, of course, it doesn't work at night.
WIND POWER
One afternoon I stood in a field in Denmark under a dark, cloudy sky.
AndMy solar panels Produce very little energy in this weather.
But above me a wind turbine was producing clean, renewable electricity.
At the moment, wind power is the best of all the alternative energy sources.
But again, there are problems.
First, they are ugly; people don't like to see wind turbines in fields.
And of course the wind doesn't blow all the time.
so, will our grandchildren get their energy from the sun, wind, or some other source?
"We're going to need everything we can get from solar, everything we can get from wind," says Michael Pacheco, director or the National Bioenergy Center, part of the National Renewabule Energy Laboratory in Golden, Colorado.
"And still the question is-can we get enough?"
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すいません、ありがとうございました。 でも、なんとなく言ってる事がわかったのでよかったです。＾＾