Here's a short YouTube video (8 mins):
Merchants of Doubt: What Climate Deniers Learned from Big Tobacco
...about the full-length movie, Merchants of Doubt. You can find the whole movie on YouTube, among other places. Very well-made, and worth watching.
The point of the movie is that, in all the discovery documents from the many lawsuits in the US against tobacco companies, there are internal documents from the tobacco companies showing that their own studies showed that smoking caused cancer & showing that they strategically moved to delay the public from knowing this for decades in order to keep their sales up. The companies' internal documents openly discuss how they created doubt in the public's minds, paying dissenters to testify & confuse the issue.
The movie goes on to show the same people hired to create this doubt have moved on to work for other industries, including oil companies as climate change deniers. New industries are using the tobacco companies' playbook.
Please watch, and decide for yourself.
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Also, here is a thread of tweets from one of the authors of the report just released:
If you follow the link, you'll be able to see all of the points she posted in reply to this initial tweet. Addresses a lot of the points that are up for debate.
(What's nice about this scientist is that she is not interested in human civilization going back to the Stone Age. She's advocating for alternative solutions in order to keep technologically advanced civilization.)
Again, this only takes a few minutes to review, so decide for yourself.
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Finally, as discussed on other threads in this forum, mass movements of people are very destabilizing.
If, in the future, people move because of flooding, crop failures, or other problems, it's going to be very difficult to manage resettlement en masse.