Adding to the evidence of direct temperature measurements

Adding to the evidence of direct temperature measurements, studies by independent teams of researchers indicate that the planet is undergoing one of the largest climate changes in Earth’s history, and also one of the fastest in the past 65 million years. Not only that, the current warming is projected to occur at a rate 10 times faster than any change over that period. (cite). How and why are these temperature changes so drastic? A 2012 PNAS (Proceedings of the National Academy of Sciences of the United States of America) study reported significant findings:
“Compared with natural factors that influence climate (including solar variation and volcanic eruptions), human activities – primarily burning fossil fuels and deforestation – have been a major contributor to climate change over the last 50 years. Burning coal, oil and gas and destroying forests overloads the atmosphere with excess carbon dioxide, adding to heat-trapping gases that already are present in the atmosphere. Combined, these gases act like a blanket covering the earth. “