From: jtem01@gmail.com   
      
   reader wrote:   
      
   > >You mean agriculture is vulnerable to the effects of large scale   
   > >volcanic activity. This has never been a secret.   
      
   > A short time effect, climate change is a very long term effect.  The   
   > current cycle is being affected by human activities starting some 8 k years   
   > ago.   
      
   The glacial/interglacial cycle is on the order of 100,000 years, if that's   
   what you mean.   
      
   > All of this is confirmed in ice core studies going back 700 k years with   
   > yearly recording of the climate.   
      
   You think 0.7 million years ago is a long time?  Honey, the Isthmus of   
   Panama formed about 3 million years ago, and it took some hundreds   
   of thousands of years beyond that to cool the seas and spark the   
   Quaternary Period, our present ice age.   
      
   The only way the ice can only go back 0.7 million years is if it got warm   
   enough to melt all of it at one or more points during the ice age, without   
   human industry or our CO2 levels.   
      
      
      
      
   -- --   
      
   https://jtem.tumblr.com/post/626087403942199296   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)