Global warming theory says that the mid-troposphere must warm faster than the surface, but in fact it does the exact opposite. NOAA radiosonde data shows almost no warming over the last 50 years at 850-300 MB. The surface data does show warming however, indicating that almost all of the measured warming is due to UHI effects. The graph below shows the divergence, which would be a negative slope if it was due to CO2 warming.
In other words, the entire global warming scam is the worst junk science in history, run by scoundrels who ignore their own rules.