A Challenge to Chemtrail Believers - Explain this 1969 Issue of Popular Science

Jay Reynolds

Senior Member.
Mick, can you please scan the entire page for us to see?
Also the table of contents if it mentions this article?
Which issue from 1969, and which page, column, etc?
 

PCWilliams

Senior Member.

I like the mention of a "new ice age" on page 75. That was the thinking back then, we were entering a new ice age. I find it interesting that the 1970s reasons for our return to an ice age (car exhaust, industrial pollution and jet contrails) are similar to today's reasons for global warming.
 
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Steve Funk

Senior Member.
It was a pretty good article for the 60's. It mentioned carbon dioxide as a warming influence and particulate matter as a cooling influence. That hasn't changed. What has changed is that we now have a better understanding of the quantitative impact of each. I don't have the link at my fingertips, but there was a literature search of actual scientific climate papers in that time period, and a majority favored the warming hypothesis, but a significant minority favored the cooling hypothesis. You can probably find it in skeptical science or Coby Beck's blog.


I was arguing about that with a chemtrailer last night. I said the Clinton administration wouldn't have done it because the scientific consensus on global warming was not rock solid until the 2001 IPCC report, and the next commander in chief, along with most of his party, thought global warming was nonsense. He mentioned a '60s paper by Carl Sagan as evidence everybody knew about global warming back then.
 

Mick West

Administrator
Staff member
It was a pretty good article for the 60's. It mentioned carbon dioxide as a warming influence and particulate matter as a cooling influence. That hasn't changed. What has changed is that we now have a better understanding of the quantitative impact of each. I don't have the link at my fingertips, but there was a literature search of actual scientific climate papers in that time period, and a majority favored the warming hypothesis, but a significant minority favored the cooling hypothesis. You can probably find it in skeptical science or Coby Beck's blog.


I was arguing about that with a chemtrailer last night. I said the Clinton administration wouldn't have done it because the scientific consensus on global warming was not rock solid until the 2001 IPCC report, and the next commander in chief, along with most of his party, thought global warming was nonsense. He mentioned a '60s paper by Carl Sagan as evidence everybody knew about global warming back then.

http://www.skepticalscience.com/ice-age-predictions-in-1970s.htm

 
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