Switzerland has been engaged at the international level to take action to reduce its CO2 emissions. However, to date, the Federal Parliament has not adopted adequate measures in this regard. As a result, citizens are losing confidence in the authorities and resort to civil disobedience. The purpose of this paper is to examine the measures that are likely to address this legislative inaction. In this respect, it is important to underline that this is a sensitive issue in Switzerland since acts of Parliament, including laws, cannot be brought before the Federal Court. Switzerland, on the other hand, is a country where the constitutional initiative – a tool which allows citizen to propose constitutional amendments – is known. This raises the question of whether this tool is likely to compel the authorities to act. It will, therefore, be useful to draw inspiration from previous constitutional initiatives launched, for example, in the field of migration.