June 5 is World Environment Day. This makes us pay more attention to our environment.

    Wang Jun is a high school boy in our school. When he uses up his exercise books, he does not throw them away. He collects them. He also encourages other students to collect their used exercise books. Then they store and sell them to a paper making factory.

    The paper is recycled and used again by students and teachers in the school. At the same time, the money from the sales goes to schools in Inner Mongolia for planting trees and grass. Inner Mongolia is one of the sources (源头) of the sandstorms that often attack Beijing during springtime.

    Our school is one of the schools in the city that take part in the “green promise (承诺)” environmental protection activity. So far, nearly 210,000 students have taken part in the activity. They have collected more than 87 tons (吨) of waste paper.

    “There have been more environment problems in many parts of China these years, such as haze (雾霾) and sandstorms,” said Wang.“We should do our duty and encourage others to do so as well.”