Mankind has roughly 100 years worth of temperature data, more than half of which is based on samples taken from few places on the planet. Its only been during the past 50 years we have added sampling stations. The continued addition of sampling stations also has the effect of increasing the result.

Now consider the earth is 4.5 billion years old.

Anything mankind gleams from 100 years worth of observations is completely meaningless. Its base on a sample rate of 1 out of 45,000,000