The purpose of this research is to investigate the effect of green entrepreneurial orientation on environmental performance and environmental sustainable development in the context of climate change, particularly relevant to climate-sensitive sectors such as agriculture and agri-food. To achieve this objective, a quantitative research approach was adopted, and data were collected through a convenience sampling method from 250 managers representing companies operating across various sectors, including agriculture and agri-food, industry, energy and environment, information and communication technologies, tourism, and other activities located in Southern, Central, and Northern Tunisia. The findings reveal that green entrepreneurial orientation exerts a positive and significant influence on CSR practices. In addition, CSR practices were found to positively and significantly affect environmental performance and environmental sustainable development in the context of climate change.