研究每个行星图像中的光线同样可以揭示物理特性，如是否存在水或二氧化碳。
Studying the light in each image could also reveal physical characteristics, such as the presence of water or carbon dioxide.
但是天然气的清洁特性主要是基于其在燃烧时较低的二氧化碳排放量。
But the cleanliness of natural gas is largely based on its lower carbon dioxide emissions when burned.
盖茨基金会正在资助一项研究，试图培育出具有这种特性的水稻，水稻跟小麦一样，缺乏这种捕获二氧化碳的细胞。
The Gates Foundation is financing research to try to breed those characteristics into rice which, like wheat, lacks this extra cell.
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