Đề bài
Đọc kỹ, gạch chân từ khoá trước khi viếtAir travel has become cheaper and more accessible, and millions of people now fly to other countries every year.
Why do more people travel internationally by air than in the past? What effect does international flying have on the environment?
Give reasons for your answer and include any relevant examples from your own knowledge or experience.
Write at least 250 words.