Can you think of ways to make the world greener? Here is an e. A couple have t around the world in 297 days—w taking any planes. Tom Fewins and Lara Lockwood used 78 buses, 61 trains, 34 cars, 18 boats, six bicycles, and e one elephant. They wanted to prove（证明）that tourists can s travel (good) without damaging（破坏）the e. They aimed to produce l than 3,000 kg of carbon dioxide（二氧化碳）, compared with six times that amount if they had gone by plane.
They spent ten months travelling 44,609 miles t 18 countries on land and sea. The couple's world tour b in June 2008 with a two-hour bus trip to London from their home in Oxforshire. They took the train to Brussels and then c a bus and train to Hamburg before going to Copenhagen. The couple even ron an elephant for 15 miles through the Chinese part of the Mekong River（湄公河）.
The couple hoped to write a book about their j. They thought it could teach other travelers how (travel) in a greener way.
