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2009年12月7～18日在丹麦首都哥本哈根召开世界气候大会，中国政府作出了降低国内单位生产总值二氧化碳排放量的承诺，到2020年中国国内单位生产总值二氧化碳排放量比2005年下降40%—50%，低碳经济与绿色生活方式引起人们重视。请据下图回答问题 (1)煤是“高碳”能源，通过燃烧。碳元素可以在_______和________之间循环流动，并主要以_________的形式进入大气圈。根据上图提出一项实现“低碳”承诺、减少温室效应的措施_______。 (2)若上图1中过程②越复杂，则该生态系统的抵抗力稳定性越________。 (3)设过程②代表的生物之间有如上图2所示的关系，若E种群的能量为5.8×10 9 kJ，B种群的能量为1.3×10 8 kJ，D种群的能量为1.5×10 8 kJ，能量传递效率为10%，则A种群的能量是_______kJ。 (4)参与过程④的生物与同区域中的动、植物等其他生物共同构成了_________。
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