这个组织致力于森林的保护和可持续发展。

This organization focuses on the ___conservation of forests and sustainable development.

为了节约能源，他们在家里使用LED灯泡。

They practice energy ___conservation at home by using LED bulbs.

专家们正在致力于保护这幅古画。

Experts are working on the ___conservation of this ancient painting.