Did you read the book "Dark Winter?" The reason the Al Gore's carbon credit exchange in Chicago collapsed was that the prominent scientist (recently retired from NASA) behind this layman's book started a research organization to study climate trends. Using the latest satellite data and other methods including solar data they concluded that there would be climate cooling for a 30 year cycle. Included was a greater chance of volcanic activity, which could worsen forecasted cooling due adding dust (and sulphuric acid?) to the atmosphere.  The effect of methane and carbon dioxide was trivial (air is mostly nitrogen and oxygen). Most government funded research is biased because man-made global warming was the politically preferred result.  The few true climatologists were not all in agreement with MM climate change.