Reuters: Al Gore raised some alarming questions about climate change in his Oscar-winning 2006 film “An Inconvenient Truth” that a German filmmaker has now tried to provide some answers for in a new documentary. Carl Fechner’s “The Fourth Revolution – Energy Autonomy” is an attempt to show how the world could be getting all its energy from renewable sources in 30 years — and help slow the climate change that Gore warned about in his blockbuster film. An unabashedly provocative look at …