Now, this article will be terribly pessimistic, but it's from a secular standpoint more than a religions one.

    We are reaching Earth's carrying capacity, our limited resources of water and nutrients are being taken too greatly, and we will soon perish. The way to prevent this is a dramatic conservation plan, involving fewer man-made amenities, and desalination plants, and a variety of other processes. And that's only a short-term solution. We also are running out of room for plants, and we will need to figure out a new way to find food.

    And remember kiddies, soylent green is people. Actually not that bad an idea in the near (hopefully far) future.