International Labour Organization (ILO) and United Nations Environment Programme (UNEP) suggest that green sectors should offer decent jobs respecting to unions and international labor rights and fulfill requirements of labor laws and collective bargaining system. Also, nonunionized working in green sectors poses a significant challenge in terms of creation decent jobs. In this line, this article presents several evidences from British Labour Force Survey to find some socio-economic obstacles behind unionization in green sectors by using logistic regression modeling method. The results suggest that union membership decision in green sectors is affected by a range of demographic and work-related factors used in the study. For example, those who are 16-24 age band, women workers, those who are employed by small sized enterprises and takes charge in high-ranked occupations are higher likelihood of nonunionized working in green sectors, compared to rest of the sectors.