public institution - a school, college, library, hospital or other place that is run for public benefit
public service - using knowledge understanding, skills and experience for community and/or national benefit
a pressure group is a group of people with similar views on a single issue who lobby elected representatives
advocating for something means to support or promote something, especially by speaking or writing about it.
lobbying is the proceses of trying to influence the opinions of decision-makers
direct action is to seek an immediate result by doing things to disrupt the work or life of the government or the people thought to be responsible for the problem