PORTLAND, Maine
PORTLAND, Maine Feb 4 (Reuters) - Eastern Canada has joined a race to export North America's vast natural gas riches to energy-hungry markets overseas, with four projects betting the far-flung Atlantic provinces will be the easiest route to Europe and India.
But firms behind those proposals, such as Spanish oil giant Repsol and Australia's Liquefied Natural Gas Ltd have one major hurdle to clear: huge investments are needed to expand regional pipeline capacity to feed them, and it is unclear who will pay.

