(2) government departments: strengthen publicity to raise people's awareness of environmental protection, economy and sustainable development; Improve relevant laws and regulations, strengthen law enforcement and severely crack down on illegal acts; Encourage scientific and technological innovation, increase investment in science and technology, and produce economic and environmentally friendly substitutes. Teenagers: actively publicize the significance of plastic restrictions and raise environmental awareness; Bring your own plastic bag when shopping, and persuade your parents to lift the basket again. Write two reasonable sentences each. )

(3) This question is open, as long as it conforms to the meaning of the question and is meaningful.