translation.en: If we had started in 2005, it would have required emission reductions of three percent per year to restore planetary energy balance and stabilize climate this century.
translation.zh: 如果我们从2005年就开始改变的话， 我们需要每年减少百分之三的气体排放， 才能在本世纪重造能源平衡， 稳定气候。