德国正在柏林建一幢生态办公楼。楼的正面安装了64平方米的太能电池极代替玻璃,其造价不仅比玻璃便宜,还能达到6千瓦的最高功率,用作照明。屋顶的太阳能电池用于供应热水。这两项设计每年可少排放二氧化碳3.5吨。楼顶有雨水收集和储存器,每年可收集1600立方米雨水,用 Germany is building an ecological office building in Berlin. The front of the building is equipped with a 64-square-meter solar battery pole instead of glass, which is not only cheaper than glass, but also reaches a maximum power of 6 kilowatts for lighting. Solar cells on the roof are used to supply hot water. These two designs can produce 3.5 tons of carbon dioxide per year. There is rainwater collection and storage on the roof, and 1600 cubic meters of rainwater can be collected each year.