There's an interesting analogy by John Maeda in his book "The Laws of Simplicity":
He compares our actions in the world today as we consume the natural resources that are not renewable to his consuming his battery on his laptop. He says at times he takes his laptops on trips without the power cord to see how long he can keep working without charging. this requires him to conserve the battery and use the laptop sparingly.
This would be a great activity for all of us to try to connect us personally with a planet that is running out of natural resources. Perhaps have our kids go a week without their iPod or cell phone chargers to give them an idea about conservation. Give it a shot and let me know how it works out.