6. Rail to the Rescue? France, Germany, Italy, Spain, the UK, Japan, and China are developing high-speed rail systems that realistically could substitute for air travel in terms of travel time, cost, and convenience. And a robust electrified high-speed rail system could make a big dent on domestic U.S. greenhouse gas emissions from aviation. But what is Amtrak doing? It's talking about cutting long-distance trains and adding more short-haul routes, but they'd be diesel operated and nowhere near fast or frequent enough to do the job. If there's no national will, there's no way.