breathable, safe and possible to breathe, atmosphere, the layer of gases around a planet, surface, the outside or top part of a planet, radiation, energy that can be harmful to living things, extreme, very high, low, hot, cold or strong, crater, a large round hole on the surface of a planet, carbon dioxide, a gas that humans cannot breathe instead of oxygen, oxygen, a gas that humans need to breathe, pressure, the force of air or gases pushing on something

PLANET

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