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Averaged over all land and ocean surfaces, temperatures warmed roughly 1.53°F (0.85ºC) from 1880 to 2012, according to the Intergovernmental Panel on Climate Change. In the Northern Hemisphere, where most of Earth's land mass is located, the three decades from 1983 to 2012 were likely the warmest 30-year period of the last 1400 years, according to the IPCC. Source UCAR While greenhouse gases are for sure to cause global warming, they alone are not the reason for increase in earth's temperature. Just curious to know if the increase in earth's temperature is due of excessive mining (of all sor