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印度人在房頂上塞個塑料瓶是要幹什麼﹐一個工藝基金組織﹐為了讓貧困地區的人都能用上電﹐就把塑料瓶改裝成了燈泡﹐成本僅需10塊就能用電一整年﹐它的製作方法其實很簡單﹐只需在裝滿水的塑料瓶中﹐加入少量的漂白劑﹐並放入太陽能燈管﹐然後將其安裝在屋頂就可以了﹐白天通過水瓶折射陽光照進屋內﹐到了晚上﹐收集好能量的燈管就可以發出55瓦光﹐能持續照亮10個小時﹐就是這麼一個環保節能
就是這麼一個環保節能
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