Nothing like a copy/paste from a random internet source. At least you left enough for me to figure out where it came from.  Here's the link.

http://news.thomasnet.com/imt/2012/02/13/climate-change-nothing-new-how-has-earths-temperature-changed-in-the-past

Here's how the author describes himself.

"Al Bredenberg is a writer, analyst, consultant, and communicator. He writes about the environment, energy, innovation, management, and sustainable business and design. Al is a lifelong learner with intense curiosity and no off-switch. He lives in Raleigh, North Carolina, USA, with his wife Virginia."

Ok, so he's not really an expert on anything climate related. What does say an organization like NASA say? 

"In the past century alone, the temperature has climbed 0.7 degrees Celsius, roughly ten times faster than the average rate of ice-age-recovery warming."

http://earthobservatory.nasa.gov/Features/GlobalWarming/page3.php