horrifyingly

adverb [方式副词]令人恐惧地；叫人毛骨悚然地

The upshot is that we’re horrifyingly nonchalant at the prospect that rising carbon emissions may devastate our favorite planet.
关键是，我们对于不断增加的碳排放可能毁坏我们地球家园的前景采取了可怕的漠视态度。