I'll link this to the Green God post, which will eventually have audio from my Newday talk and link to my Newday notes, which dealt with this question. So please read that post.
However, here's the driving question and issue for me: we are stewards and caretakers of the earth. It's the height of arrogance to think that a generation can destroy, consume the world and leave future generations to deal with the consequences. In fact, the resources of the world are a gift to us and so how we treat this gift and use this responsibility says something about us and it says something about our attitude to the giver of the gift.
Our son, Noah (not a total coincidence that his namesake was integral to God's covenant with all creation, that he saved the planet's resources for future generations) is a gift to us, we enjoy him but we have a responsibility to him. To treat him poorly, without respect, care, love and attention says something about us and says something about our attitude to the gift and the giver of the gift.
So, our attitude to the planet should be one that respects the gift, and the giver. We can use the resources, we can challenge and change and shape, we can use but not recklessly, thoughtlessly, selfishly or relentlessly. To do otherwise is more than likely an offense to God.