An envelope http://www.earlychallenges.com/stmap_64hrng.html?cipralex.cialis.asacol jacksonmedsupply.com  The first locomotives are likely to burn a dual-fuel mix of80 percent LNG and 20 percent diesel. It would not require majorengine modifications and the engine could switch back to burning100 percent diesel if LNG was not available or there was atechnical fault with the LNG system.