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As over past years, many counties econmic growth boost . It brings many consequences to the environment. As the technology being better,the energy consumption will increase. For supplying energy,it needs to release lots of wastes and harmful gaseous . Finally, the ecosystem would be destroyed. Therefore, sustainable development is needed to make a balance between socio-economic development and environmental protection. To develop economy also giving a comfortable evironmment for people to live.

In order to maintain the balance also, sustainable development have many benefit.It can reduce wastage by reducing energy use.it can also improve human health as the pollution is better so it can reduce the money use on health care.

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Human activities remove the forest for paper manufacture, furniture, and fuel.Defforestation will lead many serious ecological problem such as the destroy of forest will make the species loss their home. Afforestation is a way to restore degraded land .It means the establishment of new forest by seeding or plant on a non forest land.

The over-fishing in fisheries will make the fishs decrease in regeneration ,so the fish yield will decrease.In order to solve the problem of over-fishing ,the government had imposed such measures. The amount of fish that can be catched is limited by setting quota.It can give time for young fish to grow. Also ,the government set up the fishing movatorium to higher the fishs’ replacement rate .The use of fish explosive and fish poision in fishing are forbidden to use to protect the marine ecosystem.

The over deforestation in forest will make the forest decrease in regeneration ,the forest yields will decrease .It results the extintion of some kind of species as they loss place to live.Also, over deforestation will cause soil erosion. To solve the problem, goverment need to set the lagislation to control deforestatiom by setting up a certain area to cut the trees. Also, only use the trees that grows fast for the manufacture of paper. Also ,create the fire lines to prevent the fire be more serious.

To protect the environment,3R policy (reuse ,reduce, recycle)is employed to minimize pollution.

By recycling of paper,the size of rubbishes can be reduced.Less trees need to be removed, forest can save .By recycling of metal such as aluminium,the energy use can be reduce as lots of electrical energy is required to produce aluminum.

The organisums in the ecosystem are interdependent, each species are playing important role in the food chain.If a kind of species are destroyed,the upper trophic level ‘s species of that kind of species would also be affected. Also,the countryside is also very important ,it is a habitat of wild life. It also have many function such as to control soil erosion ,to maintain the fertility of soil

In asethetic consideration ,wild plant supply us many useful material , oils, paper and herbal medicines .Also, wild plant and animal are benefit in nature .They provide a beautiful view and environment to human and make us relax .The wild life tourism are also able to let people know the importance of conservation.

In the consideration of moral, every species also have right to live so human have no right to destroy their habitat or even kill them .As human activities ,the natural environment is being destroy, so we have a responsibility to save them.

There many protection impose to save the endangered species in Hong Kong .For example, Chinese White Dolphin are a kind of endangered species in Hong Kong .there are some protective measure are proposed by Hong Kong Government.For example, too sterize the sewage before it discharge into the water where is near Lantau Island. The northern part of Lantau Island was marked as a marine reserve .Also fishes are restricted to catch as they are the food for the dolphin.

Second, Romer’s Tree Frog ‘ natural habitat has been destroyed because of the construction of Chep Lap Kok Airport .In order to save them .More then 200 of them was rescued form the airport before the construction and sent to the Hong Kong University. Also, over 100 eggs of them are reproduce by human successfully in Hong Kong. Moreover, More 700 of them were sent from Royal Melbourne Zoological Garden to Hong Kong.

There are many ways of control the water pollution. Effluent discharge from factories is control to prevent toxic substances enter to the sea.Treating sewage is also very important to trat the domestic sewage. Agricultural effluent id treated by the intergrated farming system. The wastes are collected and then to converted to compost.

To develop an economy ,there are many constructions of infrastructure, land reclamation is undergoes to produce more land. This kind of activities will dig up the sea floor for sand to reclaim the land, so the habitats of marine organism will also affect as the water is polluted .Also the destruction of forest for paper manufacture, furniture and fuel will also cause the depletion of plant species and soil erosion.

Therefore, in order to develop economic , a good balance between environment also should be maintained.A good living environment is important related to us, so environment education and legislation is very important to educate human to aware of environmental protection and control the human activity.

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