保护森林资源是世界一大主题。
Protecting the forest resource is a main subject all over the world.
保护森林资源仍然是世界关切的问题。
The issue of preserving forests continues to concern the world.
二是积极普及沼气池，改燃节柴，保护森林资源。
It is to popularize firedamp pool actively, change bavin burning a red-letter day, protect silvan natural resources.
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