Over 6 years, citrus greening cost state $4.5B and 8K jobs
                                
                                
                                    (Newser) -
                                    Florida's $9 billion citrus industry is  under threat  from a disease called citrus greening, and this year's harvest has been the hardest hit yet, with production down 10% from initial estimates. Greening, which causes citrus fruit to become bitter and fall off trees before it's ripe, is...