Môi trường sống sạch.

A simple breakdown is:

• môi trường = environment
• sống = live / living
• môi trường sống = living environment, habitat
• sạch = clean

So môi trường sống works as one idea here, not as two separate random words.

Yes, it is very commonly treated as a set phrase meaning living environment or habitat.

Even though sống by itself means to live, in this sentence it combines with môi trường to form one noun phrase: môi trường sống.

Depending on context, it can refer to:

• a person’s living environment
• an animal’s habitat
• the surrounding environment people live in

Vietnamese often does not use a verb like to be before adjectives.

So where English says:

• The living environment is clean

Vietnamese can simply say:

• Môi trường sống sạch

This pattern is very common:

• Trời đẹp = The weather/sky is beautiful
• Nhà lớn = The house is big
• Cà phê nóng = The coffee is hot

So sạch acts as the predicate adjective, and no separate is is needed.

Because sạch is describing the subject môi trường sống.

A very common Vietnamese sentence pattern is:

• subject + adjective

So:

• Môi trường sống = subject
• sạch = clean

That gives Môi trường sống sạch.

English uses is clean, but Vietnamese often just places the adjective after the subject.

It could be understood either way depending on context.

1. As a full sentence:

   • Môi trường sống sạch. = The living environment is clean.

2. As a noun phrase:

   • môi trường sống sạch = clean living environment

Because Vietnamese does not need is in this kind of sentence, the two can look identical on the page. In your example, the period strongly suggests it is being used as a full sentence.

No. In fact, là would usually sound unnatural here.

Vietnamese generally does not use là before an adjective like sạch.

So:

• Môi trường sống sạch. = natural
• Môi trường sống là sạch. = usually unnatural

Là is more commonly used when linking one noun to another, for example:

• Đây là trường học. = This is a school.

So for adjectives such as clean, beautiful, big, good, Vietnamese usually leaves out là.

Vietnamese usually does not require articles like English does.

So môi trường sống can mean:

• the living environment
• a living environment
• living environment

The exact meaning depends on context.

If Vietnamese wants to be more specific, it can add words like:

• này = this
• đó = that
• một = one / a

For example:

• Môi trường sống này sạch. = This living environment is clean.
• Một môi trường sống sạch = A clean living environment.

A rough guide is:

• môi ≈ moy
• trường ≈ chuh-uhng / truh-uhng
• sống ≈ sohng
• sạch ≈ sahk

A few important notes:

• môi has no tone mark, so it has the level tone.
• trường has a falling tone.
• sống has a rising tone.
• sạch has a heavy, cut-off tone.

Also, final consonants in Vietnamese are often shorter and tighter than in English, especially in words like sạch.

Both are possible, but they feel slightly different.

• sạch = clean
• sạch sẽ = clean, neat, tidy; often a bit fuller or more descriptive

So:

• Môi trường sống sạch. = fine, simple, concise
• Môi trường sống sạch sẽ. = also natural, slightly more expressive

The shorter sạch can sound more direct, slogan-like, or matter-of-fact.

Yes, but it sounds short and compact.

It works well in:

• headlines
• slogans
• labels
• short written statements
• simple learner examples

In everyday speech, native speakers might often add a little more context, such as:

• Môi trường sống ở đây sạch. = The living environment here is clean.
• Môi trường sống này rất sạch. = This living environment is very clean.

So your sentence is correct and natural, but it is also somewhat brief.

It can refer to both.

Depending on context, môi trường sống may mean:

• the environment people live in
• the habitat of animals or plants
• the broader surroundings needed for life

So if you see it in a biology context, it may be closer to habitat. In a social or environmental context, it may be closer to living environment.

You can add an adverb such as rất before the adjective:

• Môi trường sống rất sạch. = The living environment is very clean.

Other possibilities include:

• Môi trường sống khá sạch. = The living environment is quite clean.
• Môi trường sống cực kỳ sạch. = The living environment is extremely clean.

The basic pattern stays the same:

• subject + degree word + adjective