text: It is a pleasure to return to return to Canada after a "snow bird's" winter to read Dr. Picard's customarily well reasoned columns.
  
  Less pleasurable is reading the climate change denying "drivel" appended to his column.
  
  It is a demonstrated fact that diseases like Lyme disease have spread north of the American border as warmer weather  makes Canada more hospitable to tics. That introduces a new worry to Canadians who walk dogs in the now endemic areas of Canada.
  
  "Shouting" that "climate change is a fraud" does not overcome the medically credible observations that we are faced with a new threat to our health no matter how vitriolic the poster.
  
  It's sad when the Globe's discussion forum become hostage to whomever shouts the loudest rather than encouraging reasoned discussion and reaction.