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In the past, a great many people used to use disposable plastic bags for shopping and other purposes. However, the excessive use of disposable plastic bags has led to great damages both to environment and to peoples health.
On the one hand, it takes about 200 years for a buried plastic bag to decompose and be absorbed by the soil. On the other hand, the use of disposable plastic bags will
indirectly do harm to peoples health, which is less known to the public. Sometimes people buy hot food packed into disposable plastic bags to save the time and labor in washing their dining utensils. Yet they are not informed of the chemicals in the bags will release in high temperature. Therefore, they are eating the poisonous stuff while enjoying the tasty food.
Its enlightening and significant that our government has banned the free provision of disposable plastic bags in supermarkets. Trial practice has shown considerable reduction in the consumption of bags. In a word, fewer plastic bags will bring us the sustainable development of our earth.
Its no doubt that university campuses will produce a large amount of rubbish every day, however, there are fewer college students paying attention to its classification.
Factually waste separation is vital to create an environment-friendly campus. Firstly, waste separation does great contribution to the environmental protection. Since some of waste is recyclable, while other is unrecyclable, if all the students could voluntarily differentiate recyclable rubbish from unrecyclable rubbish, the risk of the environmental pollution will be greatly reduced. Secondly, waste separation could save a lot of energy and tirne on its processing.
With the rapid increase in the amount of rubbish at the campus, rubbish classmification does not permit of any delay. On the one hand, as the well-educated people, college students should act as hosts of the universities and separate waste from this moment in their daily life. On the other hand, university authorities should strengthen students awareness of environmental protection and guide students to separate waste in a reasonable way.
Recently, it is reported that oil price in the intemational market has been skyrocketing drastically. In China, many traditional mineral cities in northeastem China has run into predicament, with their economy collapsed and workers unemployed, only because coal has been mined out.
Unlike sunlight, water and wind, fossil energy resources , including coal, oil and gas, are not practically reproductive during human history. Once consumed, theyre gone forever. If they were to be exhausted before we could find sufficient resources to replace them, we would have to live in entire blackout again, which is of course not what we would like to see.
Therefore, we must economize on energy resources. New techniques should be developed and applied to reduce energy consumption in industry and daily life. Altemative energy should be employed wherever possible. Any practice that wastes energy should be eradicated .
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