AVERAGE RESOURCES(资源)
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620 m3 water
| If we put flesh water and sea water together,we can each have 620 m3 water.But remember,sea water is too salty for us to drink if the factories don’t process(加工)it first.So,620 m3 is little.Saving water in daily use is important.
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0.5 hectares of forests
| There are 3.869 billion hectares(公顷)of forests on Earth.But we are losing them mainly because we cut trees too much.If we calculate(计算)at the size of a football field,we are losing 343,000 football fields every day,or 1,431 per hour,or 24 per minute !
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1.5 centimeters long corals(珊瑚)
| All the corals that we have now spread(绵延)for about 100,000 km in 109 countries.But each of us can only have such a little piece,because seas are get-ring polluted and corals are dying.
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33 stars
| According to the latest report,there are 200 billion stars in the Milky Way.Each of us can have 33 of them.Unfortunately,we cannot see most of the 200 billion stars from Earth.We can only see about 6.000 stars.If we don’t use telescopes(望远镜)or we have bad weather,we can only see about 2,000 stars.
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90kg rice
| On average(平均),we get 0.54 billion tons of rice each year round the world and each of us can have 90 kg.Asia produces and eats 90%of all the rice.How long will it take you to eat up this 90 kg rice?
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小题1:On average,maybe we each have________fresh water in the world.