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Technology has enabled scientists to trace the journey humans have taken from the origin of life on Earth to the current day.

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Smithsonian Channel • Aired Mar 02, 2022 • 44m

An examination of the Earth's freshwater supply and the ongoing challenge to maintain its quantity and quality as the planet's population soars.

From artificial photosynthesis to vegan diets, changes in science and behavior are helping improve Earth's air quality.