What are the two main gases found in earth's atmosphere?
a. nitrogen and argon
b. argon and methane
c. carbon dioxide and oxygen
d. oxygen and nitrogen

Can someone me choose a broad topic and area of focus i am really doing this as a tally to see which one most people pick ok water pollution global warming endangered species atmosphere for the !

On this map of the united states the letter h indicates high pressure and the letter l indicates low pressure . select the black arrow that accurately shows the direction of the wind.

What factors of japan’s geography make it necessary for it to import so many goods?