Transportation is an essential part of urban design. There are a number of ____41____ (benefit) forms of green transportation that support and enhance walkable urbanism. These green transportation options make our lives more ____42____ (easy), reduce congestion, reduce our ____43____ (depend) on cars and oil, are safer and less costly, help save the planet … and make life more fun!The ____44____ (green) and most sustainable forms of transportation are trains, bicycles, and ____45____ (walk). Some of the world's best and fastest trains have been in ____46____ (operate) for more than 25 years in Europe, and more than 40 years in Japan. These include futuristic highspeed ____47____ (train) like the Eurostar, the French TGV, the Japanese bullet train; and also ____48____ (region) trains, monorails, light rail, trams, trolleys, streetcars, and so on. Clean ____49____ (electricity) trains are a major form of daily transportation in numerous countries, and are the single most powerful transportation choice that can solve serious energy environmental, economic, health, and social problems on a ____50____ (globe) scale.