维护和平是许多国家的关键目标。

The ___preservation of peace is a key goal for many nations.

环保主义者专注于保护野生动物的栖息地。

Environmentalists focus on the ___preservation of wildlife habitats.

为了促进环境保护，我们应该减少碳足迹。

In order to contribute to the ___preservation of the environment, we should reduce our carbon footprint.