AIR TO AIR SHOT of Bell model 47 helicopter carrying boom hung by cables to its underside, it flies over vast clear cut area (1:30). Low altitude AERIAL SHOT over recently clear cut area (1:20). AIR TO AIR SHOT of Piper PA23 Aztec airplane flying over clear cuts in mountainous area (0:43). High altitude AERIAL SHOTS over clear cut valley surrounded by snow-patched mountains shrouded by smoke of nearby forest fires (0:40). More AIR TO AIR SHOTS of Piper in flight over same area (0:33). CS of researcher aboard plane using Aga Termovision system to survey landscape (0:55).