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Recognition of temperatures recorded by satellites and weather balloons show very minor temperature change in the last 50 years. As well, there is a bias in the geographical distribution of historical surface temperature measurements (so-called "urban heat islands"). It should be noted that the margin of error of temperature field observations is several times that of the average 0.6 degrees Celsius warming that has prevailed since the depth of the Little Ice Age around the year 1700 AD.
That extra .6 degree is killing you, eh?
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