The thin blue line

Here’s a familiar image you may have seen many times.

But as you were settling down for that movie,did you ever notice ..that the layer of atmosphere that keeps us all alive is really very thin ???

It’s taken the earth about 4.5 billion years to make this precious layer of air. It’s time to treat it like it was precious. Before it gets too late.

Al Gore weighs in ..

And one more visual  illustration to understand this quite clearly.