Which of these things are more eco friendly?

I wouldn't worry about it at all. The earth was made to handle anything we can dish out. Volcanoes spew more ges that are said to create global warming in a single erruption than any city in American does in a life time. Some how nature takes care of it all. It is the truth that they don't want you to hear. Global warming is a scare tactic used to bring down capitalism and redistribute wealth.