Final answer:
The correct ending for the sentence is 'reciclar el vidrio y el plástico'.
Step-by-step explanation:
The correct ending for the sentence is reciclar el vidrio y el plástico. This is because the sentence is talking about the action of recycling glass and plastic, so the verb 'reciclar' (to recycle) needs to be conjugated in the infinitive form 'reciclar' to match the subject 'necesitamos' (we need).
Learn more about Spanish grammar and verb conjugation