Hon vill återvinna både plast och metall, så hon går dit efter lunch.

Because hon is the subject form of she.

• hon = she
• henne = her

In this sentence, hon is the one doing the actions:

• Hon vill ... = She wants ...
• ... så hon går ... = ... so she goes ...

So Swedish uses hon, not henne.

After the modal verb vill (want to), Swedish normally uses the infinitive without att.

So:

• hon vill återvinna = she wants to recycle

This is like other modal verbs too:

• kan göra = can do
• ska gå = will / is going to go
• måste läsa = must read

You usually do not say vill att återvinna here.

Återvinna means to recycle.

Literally, it is built from:

• åter- = again / back
• vinna = win / gain

But as a whole word, återvinna is the normal verb for recycle. You should learn it as one vocabulary item, not translate the parts too literally every time.

Både ... och ... means both ... and ....

In the sentence:

• både plast och metall = both plastic and metal

This structure connects two things in a balanced way.

More examples:

• både kaffe och te = both coffee and tea
• både barn och vuxna = both children and adults

It is very common and works much like English both ... and ....

Here, plast and metall are being used as materials in a general sense, not as specific individual objects.

So Swedish naturally says:

• återvinna plast
• återvinna metall

This is similar to English when we talk about materials generally:

• recycle plastic
• recycle metal

If you were talking about a specific item, the wording could be different, but here it is about the material type in general.

Here, så means so in the sense of therefore / as a result.

• ..., så hon går dit efter lunch.
• ..., so she goes there after lunch.

It links the first idea to the result or consequence.

Be aware that så can have several meanings in Swedish, depending on context, such as:

• so
• then
• such
• like this / like that

But in this sentence, it is clearly the conjunction so.

Because after så, you get a new main clause, and Swedish normally states the subject again.

So the sentence has two main clauses:

• Hon vill återvinna både plast och metall
• så hon går dit efter lunch

In English, we also repeat the subject:

• She wants to recycle both plastic and metal, so she goes there after lunch.

You cannot just leave out hon here.

Because dit means to there or there (toward that place), while där means there (at that place).

This is an important Swedish distinction:

• dit = movement toward a place
• där = location in a place

So:

• hon går dit = she goes there
• hon är där = she is there

Since the sentence describes movement to a place, dit is correct.

Går literally means walks / goes, but in many contexts Swedish uses it in a fairly general way when someone goes somewhere, especially if the exact mode of transport is not the focus.

• går often suggests going on foot, but it can also just sound natural as goes
• åker is used when traveling by vehicle or transport, or sometimes more generally for a trip

So:

• hon går dit = she goes there / walks there
• hon åker dit = she goes there by some vehicle / travels there

If the speaker wants to emphasize transport rather than walking, åker may be better. But går dit is perfectly natural if walking is intended or if the place is nearby.

Because Swedish often uses bare nouns in common time expressions.

So:

• efter lunch = after lunch
• före middag = before dinner
• efter skolan can also occur, but that is a slightly different type of expression

Here, lunch is understood as the meal/time in general, not a specific individually identified lunch. That is why efter lunch sounds natural.

Yes. After så in this sentence, Swedish keeps main clause word order:

• så hon går dit efter lunch

That means:

1. conjunction
2. subject
3. verb

So the pattern is:

• så + hon + går ...

This is different from what happens after many subordinating conjunctions, where Swedish often has a different structure later in the clause. But så here introduces another main clause, so the word order stays straightforward.

In a yes/no question, Swedish usually puts the verb before the subject.

Statement:

• Hon vill återvinna både plast och metall.

Question:

• Vill hon återvinna både plast och metall?

The same applies to the second clause if asked separately:

• Går hon dit efter lunch?

This is a very common Swedish pattern: verb first, then subject in yes/no questions.

This sentence contains å and ä:

• å in återvinna
• ä in efter is actually just e, so the main special letter here is å

A rough guide:

• å sounds somewhat like the vowel in British English law or more, but do not rely on English too much
• Swedish å is its own vowel and should be learned by listening

Also, remember:

• å, ä, and ö are separate letters in Swedish, not just decorated versions of a and o

So återvinna is alphabetically treated with å, not plain a.

Usually, no. In this sentence, they are best understood as uncountable material nouns.

So Swedish prefers:

• plast
• metall

rather than plural forms.

You are talking about categories of recyclable material, not separate countable objects. That is why the singular material form is the natural choice.