Slide 14 of this series.
The last example in this section, which is not exhaustive by any means, is about sea level adjustments.
The graph below shows the past over a decade of data, and the attempt to show rising seas. Are they really rising or is the data made to fit that narrative?
NEXT: The IPCC organization and why it was formed, and what it advocates.
This section on data fraud offers mulitple cases and angles on the general topic. It is however not exhaustive.
USHCN Monthly Temp Adjustments
The list can expand each week given the claims of AGW and their intent.