DDT is inside organism high rich collect, often cause death or affect its reproduction. If cause the change that avian body calcium metabolizes, make calcic content decreases in blood, make what lay eggs consequently housing bate, when hatch easily crush, birthrate drops significantly, this is one of accounts that a lot of avian amounts reduce greatly.
Unreasonable the environmental pollution that discharges toxic substance to cause has comparatived in our country serious, if do not take effective measures to be polluted with active processing environment, modernization of block up socialism.
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