The 1970s saw many technological, social, and environmental changes. Key events included the break up of The Beatles, the introduction of home computers and video cassette recorders, and the US withdrawal from Vietnam. Environmentalism grew as a movement in response to pollution crises like the burning of the Cuyahoga River. New terms related to environmental issues and the counterculture emerged. Scientific advancements included the Voyager program launches to explore the outer planets.