A workshop in environmental sustainability was organized to develop the skills and competencies in mitigating climate change, adapting climate risk management, managing waste, adapting sustainable human settlements and using sustainable transport, and developing skills of reducing CO2 emissions, and conserving energy and ecosystem, & educating people. The study aimed to compare current opinion of participants in environmental sustainability. After a short notification in the print medias and websites; students, teachers, and local people expressed their interested and joined in an environmental sustainability workshop organized in the Department of Education, Assam University, Silchar, India. Non-parametric Kruskal-Wallis H test used to assess the mean differences in the opinion of the participants in environmental sustainability. It resulted that the participants who were actively participated have no differences in their opinion in skills and competencies in mitigating climate change, adapting climate risk management, managing waste, adapting sustainable human settlements and using sustainable transport, and developing skills of reducing CO2 emissions, and conserving energy and ecosystem, & educating people.