This is the 3946th most frequent Korean word.
요인
"요인" means "factor" or "cause."
요인 is used here to signify a key or major factor contributing to a result, specifically success.
성공의 주요 요인은 끊임없는 노력이다.
The main factor of success is continuous effort.
요인 is used in this sentence to refer to a component or factor that contributes to an event, specifically a road factor as an influence on an accident.
그 사고의 원인 중 하나는 도로 요인이다.
One of the causes of the accident is a road factor.
In this context, 요인 refers to contributing elements or significant influences that link climate change to environmental matters.