The Hum SCORCHING SUN ON YOUR BACK, SWEAT SEEPING THROUGH YOUR SHIRT. THE BREEZE PROVIDES A LITTLE BIT OF RESPITE, BUT NOT THAT MUCH. YOU TRUDGE DOWN A ROW THROUGH THE FIELD, STEP BY STEP, WITH AN OLD, BEAT-UP SHOVEL RESTING AGAINST YOUR SHOULDER. YOUR EYES ARE PEALED, SCAN- NING THE PLANTS ON EI...