1.   This studied the economics of reducing groundwater pollution in ten catchments overlying chalk, sand or limestone aquifers.

2.   Among the litany of environmental problems it lists soil degradation, groundwater pollution, low quality of drinking water, deteriorating air quality and deforestation.

3.   Other serious environmental problems highlighted by the report are groundwater pollution, inadequate waste-water treatment, soil erosion, and dumping of hazardous waste.

4.   Democrats argue that MTBE, while reducing smog emissions, is a major contributor to groundwater pollution.

5.   Instead, it caused groundwater pollution that has left aquifers from New England to California reeking.

6.   Instead, it turned out to be a villain, causing groundwater pollution that has left aquifers from New England to California reeking.

7.   Suddenly, the sources of water that are no longer available thanks to groundwater pollution or ill-considered development loom large in the overall water-supply picture.

8.   Story will show how the lives of key people involved have been affected by the groundwater pollutions and the suit.

9.   But enforcement action has been taken only once before against a hog farm over groundwater pollution.

10.   Dagan, of Tel Aviv University, won the prize for his work in applying probability theory to analyzing groundwater pollution.

n. + pollution >>共 113
air 60.70%
water 10.94%
ozone 3.19%
river 2.16%
oil 1.44%
mercury 1.36%
dioxin 1.36%
sewage 0.96%
groundwater 0.96%
particle 0.72%
groundwater + n. >>共 38
contamination 14.56%
pollution 11.65%
supply 9.71%
level 6.80%
code 3.88%
district 3.88%
table 3.88%
flow 3.88%
quality 2.91%
source 2.91%
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