Which famous nature-focused commercial campaign featured the 'Crying Indian' (Iron Eyes Cody) and became one of the most successful environmental PSAs in history?

Test your knowledge about one of the most influential green marketing campaigns in history! Environmental advertising has evolved significantly over the decades, with certain campaigns changing how consumers view sustainable products. This question explores a groundbreaking commercial that transformed public perception of ecological conservation and influenced an entire generation's purchasing decisions.

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Keep America Beautiful's anti-pollution campaign (1971)
Greenpeace's 'Save the Whales' television spots (1975)
National Geographic's 'Preserve Our Planet' series (1980)
World Wildlife Fund's first conservation commercials (1968)