1. Humans are perturbing the earth's heat balance by releasing greenhouse gases, which also block heat trying to escape.
adj
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