1. Humans are perturbing the earth's heat balance by releasing greenhouse gases, which also block heat trying to escape.
adj
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1. causing distress or worry or anxiety
e.g. distressing (or disturbing) news
lived in heroic if something distressful isolation
a disturbing amount of crime
a revelation that was most perturbing
a new and troubling thought
in a particularly worrisome predicament
a worrying situation
a worrying time
Synonym: distressing distressful disturbing troubling worrisome worrying