The latest version of the IPCC report is published and once again it will go unread by the great masses of climate science deniers and unreported by the media. So it might be useful to revisit the fundamental physical realities associated with human-caused climate change or anthropogenic global warming (AGW). These seven physical facts are true and are not disputed by any science:
- Carbon dioxide and methane are greenhouse gases. This is rigorously supported by experiment, observation and analysis.
- Water vapor is a strong positive feedback. If the planet warms for whatever reason, there will be more water vapor and water is a greenhouse gas and will amplify the initial warming.