More information about water
更多的关于水的信息
The oceans cover 2/3 of the Earth, but ocean water is salty.
地球表面的2/3被海洋覆盖，但是海水是咸的。
That is to say, most of the water on the Earth is not drinkable!
也就是说，地球上绝大部分的水都不能饮用！
90% of all the water on Earth that human beings can drink right now is underground.
目前，地球上可供人类饮用的水中有90%在地下。
It is very easy to pollute groundwater.
地下水很容易被污染。
For example, 4.5 litres of paint or about 1 litre of motor oil can seep into the Earth
比如，4.5升油漆或者1升电动机润滑油能够渗入地下，
and pollute 1,125,000 litres of drinking water!
污染1,125,000升饮用水！
A leak that fills up a coffee cup in 10 minutes will waste over 13,500 litres of water in a year.
这个泄漏量大概是十分钟装满一个咖啡杯，而它在一年内会浪费13,500升水。
How much water is that?
那是多少水？
You would have to drink 65 glasses of water every day for a year to get that much water!
你每天喝65杯水，喝一年才能喝那么多水！
If you leave the water running while you brush your teeth, you might waste 22.5 litres of water.
如果你在刷牙时开着水龙头，就可能会浪费22.5升水。
That is enough to fill 65 cans of soft drink!
那足够装满65个饮料罐了！
If you leave the water running while you wash the dishes,
如果你洗碗时一直开着水龙头，
you might waste 135 litres of water -- enough to wash a whole car!
就可能会浪费135升水——够洗一辆车了！
Believe it or not, the water we flush down our toilets starts as fresh water!
不管你相信与否，我们冲厕所用的都是干净的水！
Each time you flush, your toilet uses about 9 to 15 litres of water.
每冲一次，抽水马桶就耗费9升到15升水。
But it does not have to!
但这是不必要的！
A shower usually takes at least 5 minutes.
通常洗一次淋浴 至少要五分钟。
So every day, you could use 112.5 litres of water taking one shower.
所以每天你洗一次淋浴，要用112.5升水。
In a year, that is almost 45,000 litres water!
一年就是差不多45,000升水！
A bath uses even more water than showers -- about twice as much.
在浴缸洗澡用的水更多——大概是淋浴的两倍。
A bath can easily use 225 litres of water.
在浴缸洗一次能轻易用掉225升水。
