movement- When a step is taken by FORMAL or informal group of individuals or organizations to work towards bringing a good change in the society then we CALL it as "Social Movement".Purpose- The purpose of "social movement" is to bring a good change in political, religious, educational or other regions which helps to build a good society and a good nation.Some of the Social Movements are- ☪ Salt March☪ Civil Rights Movement ☪ India against corruption ☪ Feminist Movement Environmental Movement- When a step is taken to improve the status of NATURE or environment and to protect the environment then we call it as environmental movement.We all humans should be the participant and work to improve and protect the quality of the nature/environment through changes to environmentally harmful human activities; through the adoption of forms of political, economic, and social organization.Purpose- The purpose of "environmental movement" is to protect and conserve the elements of earth's ecosystem. Environmentalism works to correct the damage as well as prevent future destruction.Some of the Environmental Movements are-☪ The Chipko movement ☪ Silent VALLEY Movement ☪ Narmada Bachao Andolan☪ Save Ganga Movement ☪ Tehri DAM Conflict