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World's largest cruise ship sets sail, bringing concerns about methane emissions

The world's largest cruise ship is set for its maiden voyage on Saturday, but environmental groups are concerned that the liquefied natural gas-powered vessel - and other giant cruise liners to follow - will leak harmful methane into the atmosphere. The ship is built to run on liquefied natural gas (LNG), which burns more cleanly than traditional marine fuel but poses greater risks for methane emissions. Environmental groups say methane leakage from the ship's engines is an unacceptable risk to the climate because of its short-term harmful effects.