Climate alarmists downplay or dismiss the role of the sun in climate change, attributing most or all of it to CO2 and to man-made CO2 at that. But in this Climate Discussion Nexus "Backgrounder" video Dr. John Robson explains that a technical dispute about satellite readings of solar output since 1979 is of enormous importance here because if one side is right, temperature fluctuations over the last four decades correlate very closely with cycles in the sun's activity and if the other is, they're almost entirely unrelated. And once again, the refusal of one side to admit there's a dispute, and to try to suppress evidence of it, tells you a lot about who's doing real climate "science".