biga jogeum odeorado jeonghwa hwaldongeul gyesokhapnida.

-더라도 means even if or even though in the sense of the following action will still happen regardless of that condition.

So in 비가 조금 오더라도, the speaker is saying:

• Even if it rains a little
• Even if a little rain comes
• the main action still happens: 정화 활동을 계속합니다.

This ending often sounds a bit firm or determined, as if the speaker is saying that the condition will not change the plan.

Both can mean even if it comes / even if it rains, but there is a nuance difference.

• 비가 조금 와도 정화 활동을 계속합니다.

  • More everyday and straightforward
  • Simply means even if it rains a little, we continue

• 비가 조금 오더라도 정화 활동을 계속합니다.

  • Slightly more formal or emphatic
  • Feels more like even if that happens, we will still continue anyway

So -아/어도 is very common in speech, while -더라도 often sounds a little more deliberate, formal, or strongly concessive.

Korean commonly expresses weather this way:

• 비가 오다 = rain comes = it rains
• 눈이 오다 = snow comes = it snows

So the verb is literally 오다 (to come), but in this pattern it means that rain or snow is falling.

This is just the standard Korean expression, so learners should remember:

• 비가 와요 = It’s raining
• 비가 왔어요 = It rained
• 비가 오더라도 = Even if it rains

Here, 가 marks 비 as the subject of the clause 비가 조금 오더라도.

• 비가 오다 = rain falls / it rains

Using 가 is the neutral, standard way to say this.

If you used 비는, it would sound more contrastive, like:

• As for rain, even if it falls...
• or Rain may fall, but...

That kind of contrast is not necessary here, so 비가 is the natural choice.

조금 means a little or slightly.

In this sentence, it modifies 오다, so 비가 조금 오더라도 means:

• even if it rains a little
• even if there is a little rain

It tells you the amount or degree of rain.

A useful comparison:

• 비가 와도 = even if it rains
• 비가 조금 와도 = even if it rains a little
• 비가 많이 와도 = even if it rains a lot

So 조금 makes the condition milder.

정화 활동 is a noun phrase meaning something like:

• cleanup activity
• cleaning/purification activity
• environmental cleanup work

Breakdown:

• 정화 = purification, cleanup, making something clean
• 활동 = activity

Together, it often refers to organized cleanup efforts, especially in environmental or public-service contexts.

This expression sounds more formal and institutional than a casual phrase like 청소 (cleaning).

정화 활동 is one noun phrase, and 을 marks it as the object of 계속합니다.

So:

• 정화 활동 = cleanup activity
• 정화 활동을 = the cleanup activity/object
• 계속합니다 = continue

In Korean, when a noun phrase has more than one noun, the object particle usually goes at the very end of the whole phrase:

• 환경 보호 활동을 합니다 = do environmental protection activities
• 정화 활동을 계속합니다 = continue cleanup activities

In Korean, the present tense is often used for:

• general rules
• schedules
• policies
• announcements
• planned actions

So 정화 활동을 계속합니다 does not have to mean only we are continuing right now. It can also mean:

• we continue the cleanup activity
• we will continue the cleanup activity
• the cleanup activity continues

In this kind of sentence, it often sounds like an announcement or policy statement: Even if it rains a little, we continue the cleanup activity.

-합니다 is the formal polite style.

So 계속합니다 sounds appropriate for:

• announcements
• notices
• public instructions
• official statements
• written information

A less formal polite version would be:

• 비가 조금 오더라도 정화 활동을 계속해요.

That is grammatical, but it sounds more conversational.
The original sentence sounds like something you might see in a notice, event guide, or public message.

The subject is omitted, which is very common in Korean.

So 정화 활동을 계속합니다 literally just says continue the cleanup activity, but from context it usually means:

• we continue the cleanup activity
• or the organizers continue the cleanup activity

Korean often leaves out subjects when they are understood from the situation.
If you wanted to state it explicitly, you could say:

• 우리는 비가 조금 오더라도 정화 활동을 계속합니다.
  • We continue the cleanup activity even if it rains a little.

But in natural Korean, leaving out 우리는 is often more natural.

Yes, it can suggest that.

Because the sentence says 비가 조금 오더라도 (even if it rains a little), it specifically mentions a little rain. That can imply:

• light rain is not a problem
• but stronger rain might be a different situation

So the sentence does not directly say what happens in heavy rain. It only clearly states that a small amount of rain will not stop the activity.

If the speaker wanted to say the activity continues no matter how much it rains, they would probably choose a different expression.