I believe that one way for humanity to show respect and love for its creator is to exercise care and stewardship over his creation. In Genesis, the Bible clearly indicates that God declared his creation, including humanity, to be “good” and “very good,” therefore it is wholly inappropriate for humans to abuse the natural world and oppress others, and all the more so when done for nothing more than profit and power. Such greed and power-plays are not the way of Christ.
Romans 8:18-23 also indicates that all of creation, not just humanity, is awaiting the return of Christ and anticipating restoration with eager expectation. Just as we can partner with God now to take care of our fellow humans, so too can we partner with him to take care of our natural environment. Indeed, because of our interdependence with creation, we protect ourselves when we protect the planet. Nevertheless, while it is always appropriate to worship God, it is never appropriate to worship what he has created, be it the environment or humanity itself. In that sense Christian earth-keeping is very different from other ideologies about environmentalism and spirituality. Nature is from God and worthy of our good stewardship, but it is not God and therefor unworthy of our worship.