LETTERS

摘要

The obseryations in Peter Frenchs article Sea change' (Viewpoint. January 14) provide some hope of directly lessening port pollutants and indirectly those from other transportation venues. Yet ports cause serious environmental damage beyond nil pollution Much of our current coastal erosion and the consequent loss of coasia' habitats are directly attributable to navigational dredging with its deep canyons causing massive losses of our coastlines and the many varied habitats these sustain.