The document describes CERO, a tool to help organizations develop targeted action plans to reduce travel costs and carbon emissions through measures like increasing public transport, car sharing, web meetings, bike sharing, and carpooling. It outlines a process of defining targets, analyzing current travel habits and costs, holding workshops to identify reduction actions, and creating implementation and monitoring plans. The tool has helped numerous municipalities, regions, and private companies in Sweden reduce commute and business travel by 8-24% and save millions per year in travel costs.