A wet autumn and windy winter have helped propel hydro and wind generators.

潮湿的秋季和多风的冬季推动了水力和风力发电的进一步发展。

But a new type of wind generator may offer an answer to that problem.

但一种新型的风力发电机可能会解决这一问题。

So the lamp brightens up only when it senses an approaching pedestrian, cyclist or vehicle. Some of them even have a backup wind generator or a solar cell.

所以灯只有在感觉到行人，骑自行车的人或车辆接近时才会亮起。有些灯甚至配置了备份风力发电机或太阳能电池。