资源回收利用课件.ppt
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1、This lesson is all about the purpose or reason for recycling回收.Its all about ways in which we can use natural resources/materials again and again.Its about the many products which are found on the earth some of which once used will never return.Question?When did we first start to recycle?Recycling h
2、as been a common practice for about 2500 years.It became much more modernized in the 19th and 20th centuriesIn the 21st century it has now become a way of life all over the world including many developing countriesDid you know that:The world is full of two main products which are formed either natur
3、ally or are man made.What are they?Renewable可更新的such as:Glass metal(steel)paper,plastic and non renewable不可更新 such:Natural gas,crude oil原油原油coalExercise:Try to give me some definitions定义 or explanations of recycling:1)Using natural or manmade products again and again.2)Turning old products into new
4、ones3)Utilizing利用利用(using)mainly old products from the earth which can be used many times.4)Recycling is a process(method)of using old materials(waste)into new products to prevent wasting potentially潜在地潜在地useful materials.5)Reduce the continued consumption消费消费(using)of fresh or raw materials 新鲜的原料新鲜
5、的原料Exercise:Give me reasons why we need to recycle?1)Increasing global population.2)Need for modernization and technology.3)The need to produce more food.4)Because of deforestation森林开伐:cutting down trees for:a)Timber/wood b)making houses,c)furniture d)paper e)furniture,f)firewood/cooking.5)Killing a
6、nimals for food,skins,oil,furs.6)To preserve(keep)what is left of the natural resources for generations to come:for example,Trees,plants,animals,forests,birds,fresh water,7)So that we dont destroy the planet or the world in which we live.8)So that we can protect our natural habitat自然栖息地9)So that our
7、 children can still walk in the forests and see the animals and plant life in 100 to 200 years time.10)Because there is a heavy demand for clothes,textiles,transportation,medicine,education,industry,exploration.11)Because time is running out for healthy living.12)The world is becoming much more mode
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