There has been an increase in the activities of environmental groups in recent years. Based on the review of forty-five recent scholarly articles on environmental activism, this article focuses on trends in the literature in terms of conceptualization, themes, and directions, as well as it suggests agendas for future research. The article notes climate justice as a key concern for the direction of scholarship on the subject, and covers the themes of the emergence of Green political parties, radical environmentalism, ecological citizenship, violence and non-violence, and social conflict.