DDB Paris created this billboard, which is completely powered by oranges, for Tropicana. Electricity was generated by attaching 2,500 oranges to wood fitted with zinc and copper spikes. The orange juice dissolved the metals, causing their electrons to react and create a current.

DDB has more in store with the orange-powered campaign; all will be revealed next month.

答案是2500个橘子，可以为一个公车站广告牌供电（直到橘子干吧）。

巴黎一个名为 DDB 的团队在街头为果汁品牌 Tropicana，制作了这个水果电池广告牌。据说在下个月，他们还将在巴黎或者法国制作更多的橘子广告牌。

水果由于酸碱度的问题可以有一丝丝生物电，电压偏低，具体制作方式大家可以搜索“水果电池”。