In a Christian theological justification, for example, the mandate to protect creation plays a central role. Pope Francis provides a very prominent approach here in his Laudato Si':

Pope Francis (2015): Laudato Si‘. On care for our common home. Encyclical Letter 202. Rome: Vatican Press. Online Version

A Hindu theological justification would focus on the concepts of karma and rebirth, for instance. See for example:

Framarin, C. G. (2014): Karma, Rebirth, and the Value of Nature. In: Environmental Ethics 36 (2), 215–233.