Here’s a graph showing the extent of arctic sea ice as measured directly and indirectly for the last several hundred years:
This graphic is from Skeptical Science, where you can also download a higher res version and learn more about the background for these data. Also, on that page is a link to a large number of useful graphics related to climate change.
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Have you read the breakthrough novel of the year? When you are done with that, try:
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or Paperback
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or Paperback
*Please note:
Links to books and other items on this page and elsewhere on Greg Ladens' blog may send you to Amazon, where I am a registered affiliate. As an Amazon Associate I earn from qualifying purchases, which helps to fund this site.
Here are a few links with that graphic:
http://www.skepticalscience.com/Arctic-sea-ice-hockey-stick-melt-unprecedented-in-last-1450-years.html
http://skepticalscience.com/past-Arctic-sea-ice-extent.htm
http://skepticalscience.com/graphics.php
Global warming is a lie because I hate Al Gore!
Global warming is a lie because scientists are stupid!
Global warming is a lie because my car needs gas!
Global warming is a lie because Lush Rimballs says so!
Global warming is a lie because it goes against my politics!
Global warming is a lie because even if it is true, who doesn’t like warm weather!
Global warming is a lie because it was cold in Winnipeg last winter!
Global warming is a lie because only Lord Jeebus can change the weather!
Answer that, you smarty pants libs!