It’s not all good news, however.

There are challenges associated with bioremediation.

The breakdown of oil or plastic by bacteria, as mentioned earlier, can be a time-consuming process requiring weeks or months.

These bacteria can also be sensitive to specific environmental conditions such as temperature and sea water constituents.

Despite these challenges, there is no doubt that bioremediation holds promise as a technology for oil spill or plastic cleanup in the ocean.

Because the bacteria used in this process occur naturally, they do not need to be transported to the polluted site.

Bioremediation may be a more effective way to confront contamination problems and reduce environmental harm.

There are challenges associated with bioremediation.

There는 유도부사로 주어가 challenges이므로 복수 동사 are가 사용되었다.

associated with bioremediation은 challenges를 수식하는 분사구이다.

The breakdown of oil or plastic by bacteria, as mentioned earlier, can be a time-consuming process requiring weeks or months.

as는 ‘~처럼’이라는 뜻의 접속사로 쓰였다.

requiring은 관계대명사와 동사(which[that] requires)를 줄여서 쓴 현재분사로, requiring weeks or months는 a time-consuming process를 수식하는 분사구이다.

Because the bacteria used in this process occur naturally, they do not need to be transported to the polluted site.

used in this process는 the bacteria를 수식하는 분사구이다.

bacteria는 복수 취급하므로 대명사 they가 쓰였다.

‘박테리아는 이동될 필요가 없다’라는 의미가 되어야 하므로 to부정사구의 수동태인 to be transported가 사용되었다.

Bioremediation may be a more effective way to confront contamination problems and reduce environmental harm.

confront contamination problems와 reduce environmental harm은 and로 연결되어 to에 이어져 a more effective way를 수식하는 to부정사구를 이룬다.