How the carbon calculator translates zero waste strategies into climate benefits – The case of Barcelona

The carbon calculator is a tool designed to quantify the carbon impact of waste management strategies, with a strong focus on prevention and reuse. It enables cities to test different approaches, measure their potential impact before implementation, and make data-driven decisions to shape sustainable urban waste policies.

When applied to Barcelona, the tool assessed the city’s baseline emissions at 172,770 tonnes CO2e per year. It demonstrated how adopting a zero waste strategy could transform the city from a carbon emitter to a carbon saver. By modeling seven targeted actions, including waste prevention, improved recycling, and better organic waste management, Barcelona could slash emissions by over 187,000 tonnes CO2e annually.

Beyond emissions reduction, the tool helps cities monetise their carbon savings, potentially unlocking up to €150 million over a decade to finance sustainable waste management initiatives.

Available in English.