Global warming?

''The Disappearing Science of Global Warming'' [source]

Great article. Summary:
there are 3 major agencies that collect temperature data from all around the planet, and they all cheat, one way or another.

So, apart that proving that global warming is our fault is difficult, how should one prove that the globe is really warming up?
And keep in mind that this is not about short term weather, but "climate", which is:
"Climate (from Ancient Greek klima, meaning inclination) is commonly defined as the weather averaged over a long period of time.[2] The standard averaging period is 30 years" [source]
and that makes it impossible for any person (no matter how expert) to assess this theory at an individual experience level.