Investigate, analyaze, examine

As our current atmosphere formed, the concentrations of various atmospheric gases fluctuated. match each gas with the explanation that best describes how its proportion changed during the evolution of the atmosphere.

How important is it to have a powerful army and navy? give two reasons for your answer

1.how is germany's economic system similar to that of the united kingdom a.both are free-market economic b.both are command economic c.both are mixed economic d.both are traditional economic