As someone who writes and speaks about alternative and renewable energy, I often get asked about climate change.  What do I think about it?  What is true?  Who to believe?

There is so much noise about it.  The media knows it is an important topic to many and they know that controversy prompts viewership so they create controversy.  The U.N. Copenhagen Climate summit is the current case in point.  TV in particular provides superficial, breathless coverage of registration problems, conflicts,  walk-outs and somewhat angry talking heads arguing points of view.  So what to think?

The most cogent description of the four general …