Have you ever participated in any environmental events?

During school, I participated in environmental events that were all about preserving nature. We learned different things at those events, like how to plant various types of trees and clean our environment. We were also taught how to protect the environment from different kinds of smoke and traffic. We can use public transport instead of [...]

Yes, I remember when I was in school, I participated in different kinds of environmental events, which were all about preserving nature. We were taught about the greenhouse effect and also encouraged to plant different kinds of trees and avoid using private transport.