Christian Environmentalism

I have really been doing a lot of thinking about Christians and our views toward the environment as a concept and our local environment. Wondering how Christianity has gotten so far away from Adam in the Garden and his role as caretaker. Wondering how we have only completed the easy act of producing offspring and thus only completed or seemingly paid attention to one-third of the Dominion Mandate. Wondering why there are not more sermons...no strike that, any sermons about Christianity's responsibility for the land. God thought His Creation was good. How come we do not? Maybe too many Wendell Berry agrarian essays, but I do not feel like that is the case.