Photo taken on Dec. 4, 2010 shows a woman checking tanks of solar water heater atop a residential building in Kunming, capital of southwest China's Yunan Province. Use of solar power highlights the development of new-energy industries at the low-carbon economic era, while the solar-rich Yunnan province enjoys an average 2,200 sunshine-hours per year, or over six hours per day. [Xinhua]
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