In this video excerpt from NOVA: “Earth From Space,” learn how the Amazon rainforest impacts the chemical composition of Earth’s atmosphere throughout the day. Ground instruments, along with spacecraft such as NASA’s Aura satellite, collect data that help scientists analyze Earth’s atmosphere. Computer visualizations show how the process of photosynthesis causes the amount of oxygen in the atmosphere to increase during the day; at night, carbon dioxide levels rise. The dense vegetation of the Amazon rainforest produces about 20 percent of the world’s oxygen, but most of that oxygen is reabsorbed by the rainforest during the night.
This video is available in both English and Spanish audio, along with corresponding closed captions.
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