1. In every classroom, you can put recycling bins for paper, plastic, and other recyclable materials. This will encourage students and teachers to recycle and reduce waste.

2. Instead of throwing away your old uniform, you can donate it to a charity or thrift store. You can also repurpose it into something new, like a tote bag or a pillowcase.

3. Instead of buying new books, you can borrow books from the school library or participate in book swaps with your classmates. This will help reduce paper waste and save money.

4. If you bring water bottles to school, you should bring reusable bottles made of stainless steel or BPA-free plastic. This will help reduce plastic waste and promote sustainability.

5. Planting trees is definitely a good tip for making your school greener. Trees help improve air quality, provide shade, and support biodiversity. You can organize tree planting events at your school or participate in community tree planting initiatives.
   
                                                   Chúc bạn học tốt.