The pollution by heavy metals was a Limited factor for the water resources use.

黄河流域重金属污染是水资源利用的一个制约因素。

youdao

The application result showed that the model can realize conjunctive use of surface water and underground water in deed and improve water resources use efficiency.

实例计算表明：应用此模型指导井渠结合灌区的水资源配置可实现真正意义上的地表水和地下水联合运用，提高水资源利用效率。

youdao

They also, however, use far more natural resources fuel, water (all those baths and golf courses) and building materials.

然而，他们也使用更多的自然资源，燃料，水（来自所有的浴室和高尔夫球场）和建筑材料。

youdao

Since not all goods consumed in one particular country are produced in that country, the water footprint consists of two parts: use of domestic water resources and use of water outside the borders of the country.

UNESCO: Summary

Water cooperation refers to the peaceful management and use of water resources among various players and sectors and at different levels.

UNESCO: Social and Human Sciences

Not surprisingly, the countries are wealthy and among the world's greenest as well, according to the Environmental Performance Index, a joint product of Columbia University and Yale University, which measures performance against 25 indicators, such as measures of air pollution, water supply or use of natural resources.

FORBES: The Most Energy-Efficient Countries