Quote:
Originally Posted by Sal Munella
OK, so you think it's 0.8 degrees C. Now answer the question. (HINT: that means you explaining your thoughts on the matter, not mindlessly regurgitating a link to a web page. If you lack the ability to even attempt to explain it in your own words, just say so.)
What is the scientific basis (if any) for your claim that the Earth has "warmed 0.8 degrees C over the past 100 years"?
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It's that the trend in surface temperature records is upwards over the last century. Taking the records from various stations around the world, and combining them into a single global trend. That trend is upwards.