s we look up in the sky on a clear day, we're not just looking at thin
air, but part of a 7-layered, complex mix of gases that stretches some
430 miles above our planet (about the distance between San Francisco and
LA). This is the Earth's atmosphere, the ultimate protective blanket that
supports life on our planet. We live and breathe in the inner layer, called
the troposphere, that reaches 7 miles out from the Earth's surface. This
layer carries almost all of the moisture in the air, and, therefore, all
the weather we experience is born there. The troposphere is always on
the move, distributing life-giving water and heat worldwide.
s we look up in the sky on a clear day, we're not just looking at thin
air, but part of a 7-layered, complex mix of gases that stretches some
430 miles above our planet (about the distance between San Francisco and
LA). This is the Earth's atmosphere, the ultimate protective blanket that
supports life on our planet. We live and breathe in the inner layer, called
the troposphere, that reaches 7 miles out from the Earth's surface. This
layer carries almost all of the moisture in the air, and, therefore, all
the weather we experience is born there. The troposphere is always on
the move, distributing life-giving water and heat worldwide. 
Next