After leaving the Municipality he assumed the role of President of the “committee for referendums on the environment and the quality of life in Milan” in 2010. The committee promoted referendums on mobility, energy, water, green, and the worldEXPO 2015. All the referendums were approved with votes between 79% and 95%. The experience is considered an exemplar case of environmental democracy at the internationallevel, as it was sponsored by deputy majors of five major European cities.