This is the 8243rd most frequent Korean word.
lng를
The term "lng를" seems to be a phrase rather than a standalone word. If you mean "lng를" where "를" is an object particle, it marks "lng" (likely referring to liquefied natural gas, LNG) as the object in the sentence.
Here, 'LNG를' is used as the object of the verb '사용하다', meaning 'to use LNG'.
나는 새로운 기술로 LNG를 사용할 예정이다.
I plan to use LNG with a new technology.
In this sentence, 'LNG를' serves as the object of the verb '채택하다', meaning 'to adopt LNG' as something.
이 산업은 LNG를 에너지원으로 채택하고 있다.
This industry is adopting LNG as an energy source.
In this usage, 'LNG를' acts as the object for the verb '소비하다', meaning 'to consume LNG'.