Shell and Sasol are considering natural gas to liquid fuel plants in Louisiana, to use some of the low cost natural gas available there. Shell has a huge plant in the middle east, because there is a vast amount of natural gas available for a long enough period of time to pay back the plant cost and make money.
The keys are a large amount of natural gas for a long enough period of time at a low price. Present plants are large and cost a lot, so the numbers have to be there for consideration. You can write your Congressman all you want, they are fully aware of this. The Government is in SO much debt they can not consider it, maybe that was Bush and Cheney's plan all along.