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  Once a farmer, now a congresswoman determined to keep ‘farms viable’
                
                        Forty years after the first Farm Aid, farmers tell CNN’s Bill Weir the need still exists, along with worry around immigration raids, trade wars and climate change. "Farm Aid 40" airs live on Saturday, September 20 at 7p ET on CNN.
                            
                                3:46
                            
                             • Source:
            
                CNN
    
                    
                
      
          Climate Crisis
      
      16 videos
    
    
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  Once a farmer, now a congresswoman determined to keep ‘farms viable’
                
                    
                
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  Graphic shows all the changes in global temperature since 1850
                
                    
                
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  A blob twice the width of the US is heading towards Florida's coast
                
                    
                
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  90% of ice around Antarctica has disappeared in less than a decade
                
                    
                
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  US' fastest-growing metro area is running out of water
                
                    
                
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  'They don't live there': Alaska activists take Willow Project protest to White House
                
                    
                
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  See the technique that could help save the Great Barrier Reef
                
                    
                
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  As water levels drop at this major lake, bodies begin to appear
                
                    
                
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  Glacier larger than Florida is rapidly losing ice. What could happen if it collapses?
                
                    
                
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  A lot of your plastic isn't being recycled. CNN found out why
                
                    
                
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  Mississippi River drought will impact your grocery bill. Here's how
                
                    
                
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  How the world's northernmost caves could hold answers to climate change
                
                    
                
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  This Midwest city is becoming a safe haven for climate refugees
                
                    
                
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  The 15-year-old activist on a mission to help the planet
                
                    
                
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  See how the climate crisis is having an extreme impact on education in the US
                
                    
                
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  Why Army Corps is 'lifting the bottom' of Mississippi River