Compare running cost and emissions of your current system with an efficient one
Beginner8h1–2
Next.jsCharts
17/20Friends Carbon Budget Challenge
Compete with friends to stay under a weekly carbon budget.
Beginner10h2–4 people17/20 fit
Build Friends Carbon Budget Challenge for student groups and friends in ~10h with 2–4 people. Stack: Next.js + Firebase + Charts.
Why it wins: Gamified behaviour change that is easy to demo.
Build flow
01 · Problem
Personal climate action feels lonely and progress is invisible.
02 · Solution
Log daily choices like transport and meals, convert them to CO2 estimates and run weekly group challenges with a leaderboard.
03 · Build
- 1Build logging chips
- 2Map choices to factors
- 3Create groups
- 4Rank weekly totals
04 · Demo
Show a group leaderboard and a weekly badge.
MVP checklist
- Quick logging
- CO2 estimates
- Group challenges
- Leaderboard
Tech stack
| Tech | Role | |
|---|---|---|
| Next.js | Frontend + API routes | Web |
| Firebase | Auth + database | Backend |
| Charts | Data visualisation | UI |
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