By Larry Fine NEW YORK (Reuters) - Warnings bells have sounded on the health of golf, from lower participation and course closures to environmental demands for reduced water use, but billionaire Donald Trump says business at the high end is grand. Trump on Tuesday will stage the grand opening of Trump Links at Ferry Point, his latest golf enterprise, where he oversaw the transformation of a New York City dump into a jewel of a public course designed by Jack Nicklaus. People are thrilled," the businessman told Reuters from behind his massive desk on the top floor of Trump Tower on Manhattan's Fifth Avenue. More...