volatile+part
131collective behaviour — ▪ psychology Introduction the kinds of activities engaged in by sizable but loosely organized groups of people. Episodes of collective behaviour tend to be quite spontaneous, resulting from an experience shared by the members of the group… …
132environmental works — ▪ civil engineering Introduction infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …
