Why should Christians engage in earthkeeping as Christians and from within Christian communities? What is the underlying theological rationale for that?

In this book some 19 reasons why Christians may be encouraged to engage in earthkeeping are identified, juxtaposed and assessed in order to call for clarity, to invite discussion and to elicit creative tensions. No single position is advocated ? it would be helpful if Christians could engage in earthkeeping on the basis of any of these motivations.