There is also evidence that the water table is declining, forcing farmers to use poorer quality water containing high levels of arsenic.

也有证据显示，地下水位正在下降，逼迫农民们使用更低质量的水，这样的水含砷量较高。

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Countries are also handicapped according to their locations, with sub-Saharan African countries suffering from scant and poor-quality water, and Asian countries affected by depleted fishing stocks.

国家也由于地理位置而受到阻碍，就像撒哈拉以南非洲国家遭受缺水喝水质量差的困难，亚洲国家受到渔业资源耗尽的威胁。

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Trees can also improve water quality around farms by removing pollutants from soil and groundwater.

VOA: special.2009.09.08

Planting trees around poultry farms can improve air and water quality and relations with neighbors.

VOA: special.2009.09.08

They said the dredged material would reduce water quality.

VOA: special.2009.10.06

These new varieties grow with smaller amounts of water or with lower-quality water, such as recycled water or water high in natural mineral salts.

FORBES: Move up http://i.forbesimg.com t Move down

Or these bags can be flown to disaster sites and used as on-the-ground storage reservoirs where water can be appropriately produced and treated to provide high-quality water (see the photo below).

FORBES: Water Emergencies: Time for New Plans and Technology

In the framework of the Water World Week celebrated in Stockholm, Sweden, on 16th August, 2008 the National Water Commission (CONAGUA), together with the International Hydrological Programme of the United Nations Educational, Scientific and Cultural Organization (UNESCO), and the WET International Project (Water Education for Teachers) signed an agreement, aimed at fostering high-quality water education, particularly for formal and non-formal educators in Mexico.

UNESCO: Activities 2008