The troposphere has the most humans. This is the lowest layer of Earth's atmosphere, where we live and where nearly all weather occurs. The troposphere contains 99% of the water vapor in the atmosphere, which is essential for life.
The troposphere has the most humans. This is the lowest layer of Earth's atmosphere, where we live and where nearly all weather occurs. The troposphere contains 99% of the water vapor in the atmosphere, which is essential for life.