Paʻa ke kelepona Photovoltaic i ka wā, ke anu, ke kiʻekiʻe o ka wela, ka friction, nā kukui ultraviolet a me ka ozone, a he 25 mau makahiki ke ola lawelawe. I ka wā o ka lawe ʻana a me ke kau ʻana o ke kaula keleawe tinned, e loaʻa mau kekahi mau pilikia liʻiliʻi, pehea e pale aku ai iā lākou? He aha ka laulā ...
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