Some experts believe printers could use plentiful renewablesources like grass to replace the familiar ingredients.
一些专家认为，打印机可以使用大量的可再生能源，比如用草来替代常见的成分。
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For example, the United Arab Emirates has endorsed an ambitious target to draw 24% of its primary energy consumption from renewablesources by 2021.
例如，阿联酋已经批准了一个雄心勃勃的目标，即到2021年实现24%的主要能源消耗提取自可再生能源。
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While fossil fuels—coal, oil, gas—still generate roughly 85 percent of the world's energy supply, it's clearer than ever that future belongs to renewablesources such as wind and solar.