KnowraEarth DayLinked fromLinked fromThe 9 pages that link to Earth Day, each with the reason it gives.All 9Broader topic 3Related 5Compared with 1Silent SpringRelated: The movement Carson helped energize contributed to the climate of activism surrounding its first observance.National MallRelated: The inaugural observance drew crowds to the Mall and helped make environmentalism a mass movement.Environmental activismRelated: Its first observance mobilized millions and helped bring environmental concerns into national politics.The Blue MarbleRelated: The photograph became associated with the environmental concerns Earth Day represents.Environmental research (environmental science)Related: Its first observance amplified public demand for environmental research and policy.