Hiding the Warm Past to Build Climate Alarmism

Tony Heller at Real Climate Science has provided another interesting post on how NASA GISS makes a practice of hiding the warm past to build the case for climate alarmism.  Here is how NASA GISS has massaged the data over time to leave out earlier, warmer parts of the climate record, cool the more distant past data with adjustments (fudges), and warm the recent past (despite increased urban heat island effects):

It is not the measurements that count, it is the result you want that counts at NASA.  This adulteration of governmental records should land these people in prison, as a reader, Tom Anderson, has pointed out in his comments from time to time.

Some might argue that the temperature data has not been accurate and it needs various corrections.  If corrections of this size are actually needed, then the data is simply not useful for the purpose of making decisions about the spending of hundreds of billions of dollars or tens of trillions of dollars and for the purposes of deciding which industries will be murdered and which will be subsidized.  I would argue that the corrections made are more likely to be of the opposite sign than the reality  of man-made effects on the local temperatures around weather stations justifies.