When the wind blows, tree leaves move with it. What if we could "catch" the energy made by these leaves? A French scientist thought about this and made the Wind Tree.
The Wind Tree is not a real tree. It just looks like one, with a white body and around 36 green "leaves". The "leaves" are blades(扇叶) which can turn in the wind. When they turn, they create electricity, and then the machine collects it. The Wind Tree is like a wind turbine(风力涡轮机), but it's much smaller. It's about 5 to 10 meters tall and easy to build.
Usually, the Wind Tree can make 18,000 kWh(千瓦时) of energy in a year. That's enough to power a home of four people. If the wind is stronger, it can make a lot more electricity—about twice at most.
Wind turbines may hurt birds because they may hit the blades by accident. But the Wind Tree doesn't have this problem. The loud wind turbines usually sit on hills far away from people. But the Wind Tree is quiet. People can have them in gardens or city parks.
