Along with the economy develops unceasingly, the use of plastic bag becomes one kind of daily essential necessities in the life. Unceasingly education after many years, many people have environmental protection consciousness, but the use of plastic bag situation unexpectedly to increase steadily. In Hong Kong, Hong Kong people abandon 33,000,000 pcs of plastic bag per day, each resident average deserts 5 plastic bag per day.
At present Ireland, Australia and Taiwan have implemented the plastic bag tax, the quantity of use of plastic bag decrease larger than 50%. The administrative general manager of Green Power Mr. Man says, at 2002, Ireland levies approximate 1.5 dollars tax per plastic bag, the quantity of use of plastic bag decreases from 1.2 billions to 60 millions per year, decrease larger than 90%.
In the past year, Hong Kong government is studying to carry on the plastic bag product responsibility and feasibility, levies the plastic bag tax to the producer, to decreases the resident to the dependence of plastic bag. But in the consulting time, the producer and the resident can reduce the use of plastic bag in this period.
Because the plastic bag needs 400 years to decompose, it causes the enormous damage to the environment. According to information, because a great lot of plastic bags and the organic matter are promiscuous and puts on the junkyard unceasingly, it make the soil layer to subside inequality. So the land needs a long time to be use. And the pressure is not equal, if the too high building is constructed in the land, it will make the building subside possibility, therefore it is not suitable to construct too high building. If the junkyard has not guarded against leaks the level, the land is polluted by the electronic waste and the plastic bag, it will lose the planter ability.
The common resident can do daily, e.g. trash classification, can help the useful material recycle. Bring your own bag in shopping, can reduce to take the plastic bag to the merchant. In merchant, because merchant directly contact the customer, may promote all kind effective preferential benefit to take less plastic bag. The merchant and the manufacturer cooperation can change to use recycle or decomposable environmental protection material.
Decomposable plastic bag category
 label or   printed on environmental protection product, this product does not belong to decomposable plastic category, only belongs to recycle or is made by recycle plastic, the effective of environmental protection is not too big. The decomposable plastic refers to add some accelerate decomposable auxiliaries in plastic, either synthesizes itself has the decomposable ability or made by the natural recycle material. It makes the finished product to keep its original requirement performance in the use period and the preserve period. Under the specific time and the environmental condition, it may change its chemical structure and cause the certain natural damages in shorter time.
Decomposable plastic category
At present, according to the decomposition detachment condition or the request for China, the decomposable plastic can be classified: Photo-degradation plastic, Hydrolysis-degradation plastic, Biodegradation plastic and Oxidative-degradation plastic. Between they may mutually synthesize the better performance decomposition plastic. is one kind of plastic additive which combine Photo-degradation, Hydrolysis-degradation, Biodegradation and Oxidative-degradation. It can make the plastic product fully degradable, finally it decomposes to water (H2O) and carbon dioxide (CO2).
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