Yesterday, our school held a school sports meeting on the playground. At the end of the school sports meeting, there was much litter on the playground. The students threw litter onto the ground, such as wastepaper and plastic bottles. It looked so dirty that I asked my classmates to collect them with me. After a few hours, we collected bottles more 100. We took them to a recycling center, and then we sold them. We used the money to take part in fund-raising for poor children. The children were very happy!