Clean Air . . . Mono Monday 64

For me the problem with this challenge was how to make the invisible AIR visible in an image.  I decided to use trees because they remove the carbon dioxide from the atmosphere and release oxygen for us to breath.  Also I've been married to the forester for a long time and my first art class today were going to be sketching autumn leaves.  Here are 6 year olds with hands in the AIR for trees.  I forgot to tell them to throw their leaves.