9. Aerosol aurora over Earth • Earth.com 9. Aerosol aurora over Earth

This image is beautiful – until you realize what it’s showing. NASA’s Earth-focused satellites monitor the aerosol droplets lingering in the air at any given time. This 2018 image shows particles released by smoke in red, dust in purple and cyclone-whipped saltwater in blue. Aerosols also emit from vehicles, factories and other human-made sources, which fall under the red-colored layer in the processed photo.

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