Part 3.

I once attended the tree-planting festival. The school held this event on the sports ground with the help from the local forestry department. During the festival, some representatives from each class were invited to plant trees on the campus. The teachers and students all worked together to water and take care of them. We also had a speech contest in which all the participants spoke about their own ideas on protecting the environment. My school has done a lot of things to raise our awareness of protecting endangered animals and forests. Sometimes our biology teacher will show us a documentary film or give us an interesting lecture on this subject in class. She often encourages us to develop good habits such as turning off lights when leaving a room or saving water when washing hands.
 My school has provided students with opportunities to participate in many activities that help protect our environment. It has an environmental protection group, whose members mainly volunteer from different classes who love nature and protect it wholeheartedly. They take part in many meaningful activities such as cleaning up trash around the campus, making posters for environmental protection and even fundraising for repairing damaged forests and waterways around Vietnam by giving speeches at schools, companies and communities across the area.

Part 2.

I've been to the zoo and I'm interested in the natural environment.
I have visited national parks, forests, mountains and waterfalls and have seen a lot of animals. I never saw any endangered or threatened species.
I like animals. As for the new kind of zoo, I think it's good because people can enjoy the animals much better than in a cage with bars.
I think it's important to protect forests because they are essential to our life and our survival. Because they provide us with clean air, clean water and many other things we need.