下左图示意我国大部分城市道路两侧绿化种植池现状,针对当前的城市问题有环保学者提出设计建议(下右图所示)。读图回答下列各题。
He realized his mistakes and took action to reduce the loss _________ it was too late.
阴影部分的面积=____面积-____面积=____