10 harmful things when using computer : 

- Increased risk of obesity : Tăng nguy cơ béo phì

- Affects bones : Ảnh hưởng tới xương

- Injury to the eyes : Tổn thương tới mắt

- Disturbing sleep habits : Gây xáo trộn thói quen ngủ nghỉ

- Limit the development of thinking : Hạn chế sự phát triển tư duy

- Lack of community skills : Thiếu đi các kỹ năng cộng đồng

- Causes depression, anxiety : Gây trầm cảm, lo âu

- Inflammatory skin diseases : Các bệnh về viêm nhiễm da

- Increased risk of cancer :  Gia tăng nguy cơ ung thư

- Digestive disorders : Rối loạn tiêu hóa

Computer now is very popular to people in the world. It helps us do manything. It has many advantages such as we can search the information in the Internet faster than search it in the books. Nowadays,we can communicate with each other even though we are very far away from them. Moreover, we can learn foreign language, read newspaper, watch TV, listen to music.....manything.
However, it also has some disanvantages. It wastes lots of your time for sitting in front of the computer which is not good for your help and makes you lazier.

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