In 2010, using solar power to boil your kettle would have cost you about £0.03. By 2020, according to estimates by our research team at UBS, the cost will have fallen to half a penny. By 2030, the cost could be so near to zero it will effectively be free.
2010年，利用太阳能烧开一壶水的成本约为0.03英镑。到2020年，根据瑞银(UBS)研究团队的估算，成本将降至0.5便士。到2030年，成本可能如此接近零，以至于实际上将相当于免费。
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