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Trees are responsible for around 50 percent of the oxygen on the planet, with the other half coming from the ocean. This shows how important our trees are; as well as the ocean.
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The camera obscura later became a popular tool during the Middle Ages and the Renaissance, particularly after inventors began using biconvex lenses to brighten its images. Astronomers used it to protect their eyes while observing the sun and solar eclipses, and artists employed it as an aid in portraiture and landscape painting.
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