1. Don't let the last drop of water become our last tear.
2. Without green, there is no life.
3. Don't let white plastic bags cover our white clouds.
4. Pick up a piece of paper to recharge your mind.
5. Life is precious and environmental protection is more expensive. If the earth is beautiful, environmental protection cannot be abandoned.
6. Blue sky, green grass and endless environmental protection!
7. To protect the environment is to protect human beings themselves.
8. Each person can save a drop of water before saving a field.
9. Everyone is a green angel. We should use green practical actions to influence people around us. We should also protect the campus environment and jointly build a green campus.