RACES was a LIFE+ project to raise awareness con climate change and energy savings. One of its main aim was to test if and how communication efforts towards a specific group of people could lead changes in behaviors. To measure this changes one of the main actions of the project was the “Carbon Budget” (CB) which involved almost 250 families in a long monitoring of CO2 emissions generated by family’s energy consuming behaviors. Main objective of the CB was to evaluate “if” and “how much” the participation in the project was a real trigger for participants “effort” in changing behaviours, compared to own previous consumption standards.