这个数字会逐年增加，因为随着桥梁结构的不断瓦解，修复它们的成本只会更高；随着海平面和气温的持续升高，森林火灾的加剧，降低灾害损失的成本也会增加。
That figure increases every year, because as bridges continue to weaken, it costs even more to fix them; and as sea levels and temperatures continue to rise, and as forest fires become more severe, it costs more to mitigate the damage.