If you take a plane, I'll say it's about 8 hours. I'm not 100 accurate but it should be around that time.
Answer:
Different layers represent clouds made of gases that condense at different temperatures. The gases will condense to form clouds at different altitudes on different planets because the condensation of a gas requires a specific amount of pressure and temperature.
Predicting where an earthquake epicenter will occur is easier because are patterns to look at due to the fact that they always occur near plate boundaries. Predicting when they will occur is difficult because they do not follow any certain pattern.
Green house gases and pollution