Will + base verb expresses a decision made now or a prediction; be going to + base verb expresses a prior intention or a prediction based on present evidence. In a passive clause, the receiver becomes the subject: People collect paper → Paper is collected. Keep the original tense in be: will collect → will be collected. The agent with by is optional when unimportant.
Topic preview: I recommend preventing waste before buying replacements. Bringing a bottle reduces the need for disposable cups, provided there is safe drinking water. Reusing paper can save resources, but private information must be removed first. A daily monitor is practical because responsibility is visible and shared. We should compare the same type of waste over equal periods rather than promise a result we have not measured.