Yes there are green energy technologies; but there are also fakes. This morning's New York Times on line brings us the fact that some food companies are reducing the size of their packages to disguise price increases and promoting the new packaging as "greener" because there is less of it!
The thing about 'green', is it isn't a zero sum game. Yes, we will probably never be free of petrochemicals as long as we are unwilling to give up technology and civilization as we know it. However, we can certainly be a lot more efficient about it. We are doing a lot better than we were 20 or 30 years ago, and in 20 or 30 years we will probably be doing even better yet. That was the whole point of the 'carbon footprint' concept - that nobody can make their carbon footprint zero without living in the woods like Grizzly Adams. But it's a good benchmark of how good you are doing, and it is clear that some people/companies/governments are better than others, and we could all probably improve at least some.
Scott must have drawn this strip while he was dealing with trying to make his new home "green". The story of Scott's "Green Home" is at: http://online.wsj.com/article/SB10001424052748704868604575433620189923744.html