LNG is non-toxic, odorless, non-explosive and non-flammable in its liquid state. LNG only burns after it has been re-gasified and mixed in the proper proportion with air. (Natural gas burns within the narrow range of a 5 to 15 percent gas-to-air mixture.)
LNG has about 45 percent of the density of water, so if spilled onto a waterway, it will stay on top of the water until it evaporates into the atmosphere. Since commercial LNG transport began in 1959, LNG has been safely transported, stored and delivered to densely populated cities in the United States, Europe and Japan.
More than 135,000 LNG carrier voyages, covering more than 151 million miles, have arrived safely without a significant accident or safety problem, either in port or on the high seas. LNG ships are well-built, robust vessels with a multi-hull design to withstand the low-energy impacts common to harbor and docking operations.
LNG ships are a common sight in heavily populated ports throughout much of the world. In fact, Japan receives 96 percent of its natural gas via LNG carriers.