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    America's Heartland
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                            Season 5
                        
                    
                    
                        
                            Episode 21
                        
                    
                
            
            
            Learn about the many uses for soybeans in a journey from rural Iowa to San Francisco. You'll explore efforts to grow the market for soy-biodiesel fuel, discover industrial products made from soy oil, and hear from a leading soybean researcher. You'll also see the popularity of soy-based foods in San Francisco's Japan Town and even visit a beauty store selling soy-based lotions and cleansers.