Three mixture found in nature are:
Nitrogen compounds have a long history, with Herodotus mentioning ammonium chloride.
After hydrogen and helium, oxygen is the third most abundant chemical element in the universe.
Carbon dioxide is a colourless gas with a density that is approximately 53% greater than that of dry air.
Final Answer:
Nitroge, Oxygen and Carbon dioxide are the mixtures which are found in nature.