Which of the following actions can help promote sustainability in schools?

1. Putting recycling bins in every classroom.


2. Exchanging old books and uniforms with friends or giving them to charity.


3. Borrowing books from the school library instead of buying new ones.


4. Bringing reusable water bottles to school.


5. Planting trees at school.


6. Finding creative ways to reuse old items before throwing them away.