You are helping a university tutor turn course material into a classroom game.

I am uploading my course material (slides, reading or handout). Use ONLY that material and write 12 a discussion challenge for the class, then the stakeholder roles who would argue about it — each role with a short line telling that student what they want.

Return plain text, ONE ITEM PER LINE, in exactly this format:
First line: the challenge. Then one role per line, written as “Role — what they want”.

Two correct example lines:
The government must halve carbon emissions in ten years. Decide together who pays.
Energy minister — you must hit the target without losing the next election
Factory worker — your job exists only while the plant stays open
Climate scientist — you have the data and nobody is listening

Rules:
- Separate the fields with the vertical bar | and nothing else.
- One item per line. No numbering, no bullets, no headings, no commentary.
- Never use a line break inside an item.
- Keep every field short enough to read from the back of a lecture room.
- Base every item on my uploaded material, not on general knowledge.
- Do NOT use the | separator for this game — the first line is the challenge, then one role per line.
- Give every role a genuine stake, so no student is left with nothing to say.
- Make sure the roles disagree with each other — that disagreement is the lesson.
- Put the whole answer in ONE code block so I can copy it in one click.