Contemporary labour markets are deeply affected by environmental changes, whether they are impacted by climate change natural phenomena, climate migration or by effects generated by policies interventions aimed at mitigating environmental threats. To tackle the potential negative consequences on employment rates and on natural and built environment, in the last few decades world economies have started to develop decarbonization strategies on several levels of implementation. The shared objective would be to reach a so-called Green Economy, a sustainable economic model that does not harm the environment while maintaining or fostering growth and employment, through a change process called "green transition". The first goal of this thesis is to provide a review of the major causes of impacts (and their magnitude) on employment levels associated with climate change and mitigation policies, namely: climate change natural phenomena; climate migrations; policies and regulations targeting businesses and labour; carbon pricing measures.