填词补文 low compared to personal another require running out of refers to economic positive limited Often referred to as green transport, sustainable transportation is the way of the future. Transport powered by gas and petrol is running on a __1___ time frame, as both these sources are unsustainable in the long run. In contrast, sustainable transportation offers an option to a world rapidly __2____ renewable fuel sources. It ___3___ any kind of transport that has a low impact on the environment, such as walking, cycling, mass transit, green vehicles, and car pooling, almongst others. Any mode of transport is deemed sustainable if it has a __4___ environmental impact and uses little or no fuel. Walking is the best example of sustainable transportation, as it does not ___5___ any gas. However, Walking can be impractical if you are travelling longer distances. Cycling is ___6___ green transport option and is a far more practical option for longer commutes. Using public transportation, such as buses or trains, is also more sustainable ___7___ private vehicles. The amount of fuel used to transport a bus full of people is more effective compared to a single person driving a ___8___ car. A sustainable transport system has a ___9___ impact on environment, and helps to promote social and _____10____ sustainability in the communities it serves. Increased mobility usually results in better social economic conditions.