<em><u>i</u></em><em><u> </u></em><em><u>guess</u></em><em><u> </u></em><em><u>its</u></em><em><u> </u></em><em><u> </u></em><em><u>Japan's economy</u></em><em><u> </u></em><em><u>slowed</u></em><em><u> substantially in the 1990's</u></em>
The two factors, Temperature and Pressure, have the greatest influence on the state of each of Earth's layers.
Hope I helped!