Footprints: Two Hundred Billion and Counting

We all leave some footprints on the planet as we live our lives - evidence of us having been here. We are not always mindful of the results of our actions and the impact they have on the ability of the planet to provide a livable environment for future generations. Like the question in the song Alfie, "Should you take more that you give, Alfie?" I guess that is a question that we should all consider as we consume the resources which are essential for human habitation, often wastefully and u...