If you get questions about how we know that the earth is warming but the people who ask don’t want to hear about computer models or climate data, you might be interested in this recent blog post from Skeptoid. The audio track and transcript explain the basic physics behind the calculations of temperature on a planet that is being warmed by excess carbon dioxide and how physicists know that the carbon is coming from fossil fuels and not just from recent activity by plants and land use changes. You can read the transcript and listen to the podcast at https://skeptoid.com/episodes/4549.
