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Ozone is made up of three oxygen atoms. It has benefits and dangers depending on where in our atmosphere it occurs: near ground level, it is a pollutant that affects respiration; 10-50km up, in the stratosphere, the ozone layer filters out potentially harmful ultraviolet rays (which cause skin cancer) from reaching the earth. Ozone also functions as a greenhouse gas, though it is considered a less potent one than CO2.
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The two giant bubbles of high-energy gamma rays protruding from the Milky Way, each spanning 25,000 light-years across, roughly the size of the galaxy ...
