Priestly stewardship suggests that creation is not just for us, that it has purpose independent of the uses we can make of it. All of creation-human and nonhuman alike-exists ultimately for God and to the praise of God.
What worries some people about consumption (and I confess at the outset to be one of these ambivalent creatures, fat but troubled in paradise) is that the affluent, technologically advanced West seems more and more focused not on consuming to live but living to consume. The problem with consumption, and the consumer capitalism that has pushed it to feverish historical extremes, is that it has become so all-consuming.
It was only in the late nineteenth century and then the twentieth century, with the maturation of consumer capitalism, that a shift was made toward the cultivation of unbounded desire. We must appreciate this to realize that late modern consumption, consumption as we now know it, is not fundamentally about materialism or the consumption of physical goods. Affluence and consumer-oriented capitalism have moved us well beyond the undeniable efficiencies and benefits of refrigeration and indoor plumbing.
Significantly, God in Genesis 1 pronounces the rest of creation "good" before humanity is created. The psalmist and the prophets Isaiah, Jeremiah, and Ezekiel can speak of mountains, trees, sun, and moon praising God. Unlike an office complex or gymnasium, which have no value if people do not inhabit them, creation can glorify and bring God delight apart from human presence.