conserve|conserving

我们应该节约用电以减少能源浪费。

We should ___conserve electricity to reduce energy waste.

我们通过回收纸张来保护森林资源。

We ___conserve forest resources by recycling paper.

我们正在通过种植更多树木来保护森林资源。

We are ___conserving forest resources by planting more trees.