请分析这句的结构.
问题描述：
请分析这句的结构.
even a vastly more ecoefficient industrial system could,were it to grow much larger,generate more total waste and destroy more habitat and species than would a smaller,less ecoefficient economy.
were it 那里有点不明白是怎么回事
答
完整的形式 if it were to grow ………… ,虚拟语气
去掉if 后,用倒装