Unions and city hall differed on how many of the collectors had walked off the job on TuesdayParis city hall said that 16 percent of staff, or one in six, were strikingPARIS: Paris garbage collectors went on strike on Tuesday, two and a half months before the French capital is due to host the Summer Olympic Games.Paris rubbish collectors had been warning that they could strike over the summer, raising the spectre of piles of stinking trash roasting in summer heat on the streets as hordes of athletes and tourists descend on the City of Light.