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No one needs to tell Laurel Moffat, Senior Communication Specialist at Southwest Airlines, how hard it is for the airline industry to be green. Just last year, Southwest used nearly 2 billion gallons of fuel to operate its fleet. But, that same year, the company invested nearly $400 million to increase its fuel efficiency and reduce emissions. Another innovation the airline is touting is its satellite-based navigation system, which guides pilots on the most efficient routes possible.