Ganapathi Bhat goes to work most mornings carrying a homemade contraption consisting of a small motor, a rudimentary seat and a set of wheels - all expertly combined to help the farmer swiftly climb tall trees. The 50-year-old farms areca nut in the coastal town of Mangaluru in Karnataka and has to regularly scale 60- to 70-foot-tall trees to harvest his crop. Too old to