Climate change deniers don't have a lot of credible scientists who support their view. But they have a few, and one of the busiest and most prolific is Wei-Hock Soon, who insists that global warming is caused by variations in the sun's output, not by anything humans are doing. Soon's doctorate is in aerospace engineering, not atmospheric science or geophysics or some more relevant discipline, but he's nonetheless an actual scientist and a reliable ally for the climate deniers.
while failing to disclose that conflict of interest in most of his scientific papers. At least 11 papers he has published since 2008 omitted such a disclosure, and in at least eight of those cases, he appears to have violated ethical guidelines of the journals that published his work.