
Before you start feeling all warm & fuzzy about Earth Day & Earth Hour, step back & look at how much civilization depends on carbon-based fuels.
By civilization I mean basic improvements to the human condition: medicine, running water, heat, food. Every one of those fundamental things developed or improved in the last two centuries have dramatically impacted the lives of everyone on the planet for the better, and they all come from carbon-based energy sources. Do you really want to live without those?