HONG KONG, 4 June 2026 — Carousell has launched its first interactive Circular Economy Impact Microsite, introducing a hyper-local Neighbourhood Leaderboard to map the estimated climate impact of secondhand transactions across Hong Kong. The rollout coincides with World Environment Day on 5 June and aims to visualise how everyday consumer actions translate into measurable community-level carbon savings.
The platform features a Neighbourhood Leaderboard, a Carbon Calculator, and category-based impact data, enabling users to track potential CO₂e avoided per transaction. According to Carousell, one secondhand purchase on average prevents 15.6kg of CO₂e emissions, roughly equivalent to 31 hours of continuous air-conditioning use.
Carousell developed the carbon measurement methodology with European climate-tech platform Vaayu, using lifecycle assessment models and survey-based displacement rates to ensure data reflects real behaviour. The company reports that its regional ecosystem contributed to an estimated 262 million kilograms of CO₂e potentially avoided over the past year.
