Carousell has launched an innovative Neighbourhood Leaderboard in Singapore, mapping the climate impact of secondhand transactions for World Environment Day on 5 June. This interactive platform visualises carbon savings across various item categories, encouraging community engagement in sustainable practices.
The platform, accessible at impact.carousell.com, aims to make carbon data transparent, showcasing how everyday actions contribute to environmental goals. “For too long, climate metrics have been delivered as abstract, top-down numbers,” said Marcus Tan, Co-founder of Carousell. “We want to use this visibility to spark local pride and encourage more users to actively participate in circular trade.”
Key features include a Neighbourhood Leaderboard, updated daily to track potential CO₂e avoided, a Carbon Calculator for estimating savings per transaction, and Impact by Category visualisations. The platform uses a lifecycle assessment methodology developed with Vaayu, a European climate-tech firm, to ensure accurate carbon avoidance metrics.
Carousell’s initiative bridges the gap between corporate sustainability reporting and consumer actions, turning abstract data into practical tools for community benchmarking. The broader Carousell Group has reportedly avoided approximately 262 million kilograms of CO₂e in a year, equivalent to the carbon footprint of over 507,000 passengers flying from Singapore to London.
This platform not only highlights local dynamics but also encourages individuals to contribute to a circular economy by listing unused items. By doing so, Carousell hopes to make secondhand the first choice for consumers in Greater Southeast Asia.



