我们的首要任务是节约用水。

Our top priority is ___conservation of water.

随着能源节约问题变得越来越重要，我们公司也决定开始采取行动。

As the issue of energy ___conservation is becoming more and more important, our company has decided to start doing something about it, as well.

有效的节约措施可以显著减少家庭开支。

Effective ___conservation measures can significantly reduce household bills.