In addition, there were squiggles in the data that indicated other molecules, possibly carbondioxide, sulfur dioxide, methane or more complexcarbon-based molecules.
Experts' estimates of carbondioxide emissions are based on fuel going into power plants and complex formulas that calculate power plant efficiency.
专家对二氧化碳排放量的估算主要依据进入电力厂的燃料以及计算电力厂能效的各种复杂公式。
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Such activity is essential to life as we know it, because it helps enable complex chemistry and recycles substances like carbondioxide into the atmosphere, which keeps Earth warm.