It’s our duty to keep the environment cleanAt my school, we held a practical activity last week. In order to make our environment much cleaner and more beautiful, my classmates and I walked along the streets to collect litter. As long as we saw litter, we picked it up, such as plastic bags and cigarette ends. After we collected them together, we put the rubbish into the nearby recycling bin and non-recycling bin. In this way, the litter can be changed into energy and be reused again, which is a good way to save energy. Besides, we made posters and called on more people to learn to divide the rubbish into different kinds so that it will be reused. I think it’s our duty to keep the environment clean. I felt happy to see the clean street.