The south shore of Long Island, one of New York's greatest recreational assets, is receding at the rate of up to six feet per year. In many cases, efforts to halt this erosion actually have increased it. Buildings cone thought safely constructed back from high tidemarks today protrude far into the water.Even more, the number of homes an facilities built too close to the sea's edge has dramatically increased, making the south shore probably less ready to withstand a major storm than at the time of the cataclysmic hurricane of 1938.Thus, the question of what to do now to overcome and avoid these hazards takes on real urgency. Pointing to past mistakes, many Long Islanders insist that only by acting in an informed reasonable way can safe and environmentally sound development be possible for everyone.