00:00:00.000 — The still from the 1968 PSA 'Let's Clear the Air!' features a stylized map of the United States, prominently displaying the word 'USA.' The map is illustrated in a simplistic manner, emphasizing the geographic shape while possibly hinting at themes of air quality and pollution. The production by the U.S. Department of Health, Education and Welfare indicates a focus on public health awareness during a time of rising environmental concerns. The visual simplicity serves to convey a serious message about air pollution and its impacts on the nation.

00:00:44.444 — The still from 'Let's Clear the Air! Air Pollution PSA - 1968' depicts a crowd of animated characters gathered in front of a building labeled 'CITY HALL.' The characters appear to be protesting or demanding action, emphasizing community involvement in addressing air pollution issues. The animation style is simple and conveys a sense of urgency related to environmental concerns prevalent during that era. The image reflects the film's message regarding public awareness and government responsibility in tackling air quality challenges.

00:00:46.880 — The still from 'Let's Clear the Air! Air Pollution PSA - 1968' features an animated scene depicting a crowd holding protest signs related to air pollution. In the foreground, a central figure, likely a speaker or leader, stands assertively, gesturing with a sign. The background includes a diverse group of individuals, all drawn in a simplistic, outlined style, emphasizing urgency and concern for environmental issues. The overall tone is one of activism, aiming to raise awareness about air quality and pollution.