Hey, https://www.bumi.club is Nice! I assume the name is based on Bhumi (Earth) in Tamil language?
This is close to solving what I was telling in this problem.
Couple of suggestions,
Make email optional.
As soon as the answer for 'anything good' question is received move to climate action automatically (may be give some points already).
Do everything possible to make it fun and interactive; we know that peer pressure works from the #garbage and #teamtrees hashtag events.