1.Noun phrase as subject: "Promoting public awareness" serves as the subject of the sentence, demonstrating the use of complex noun phrases to convey the main idea.
2.Infinitive phrase as adverbial: "to address plastic pollution" functions as an adverbial phrase, explaining the purpose of the government's strategy.
3.Present participle as adjective: "Encouraging citizens to adopt the principles of reduce, reuse, and recycle" uses the present participle "encouraging" as an adjective to describe the government's action.
4.Parallel structure: "reduce, reuse, and recycle" employs parallel structure to emphasize the three principles, enhancing clarity and readability.