Civilized slogans use a rhetorical device.

(1) metaphor-green campus, the cradle of our healthy (happy) growth/green campus, our home is the same as * * *! (2) Comparison-Green campus makes us healthy, happy and elegant. (3) Duality-building a green campus and cultivating innovative talents. Culture/trees decorate the world with green, and we beautify the campus with civilization!

This topic is not difficult. We should closely focus on the theme of "building a green campus", and rhetoric methods can be metaphor, personification, duality, parallelism and so on.