Which gas is the most abundant of the trace gases? nitrogen oxygen argon carbon dioxide

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The map above shows where people live in the united states. areas that are darker blue are areas where people live close together. areas that are lighter colors are places where people live farther apart. as a geographer, if you were to study where people live and why they choose to live in these places, which of the six essential elements of geography would you be using?

What type of coastline is commonly found along the western side of the america’s