This switch has decreased pollution in the country's major lakes and reservoirs and made drinking water safer for people.
这一转变已降低了中国主要湖泊和水库的污染，使人们的饮用水更加安全。
The report assessed the condition of the reef between 2009 and 2014. It showed that pesticide and pollution have decreased, but not enough to reach environmental targets.
该报告评估了大堡礁2009年到2014年期间的状况。报告显示农药和污染已经有所减少，但是尚未达到环保目标。
The egg and hookworm larva pollution rates of soil and water samples also decreased obviously, but the enterobius infection rates decreased slightly.
土壤和水样中虫卵和钩蚴污染率亦明显下降。 但蛲虫感染率无明显下降。
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