Water Cycle

Round and around it goes, steaming up as vapor and then falling as rain or snow. It’s the hydrologic cycle and it goes on endlessly day after day, night after night all over the world. A billion tons of water every minute - up and down. Every day about 12% of the vapor in the atmosphere falls to the earth and is replaced by a fresh supply.

And everywhere this enormous gift of rain or snowfall accomplishes a variety of essential services for our earth by cleansing the air, moderating the temperature and, most obviously, nourishing the plants and animals on the earth.

Into Thin Air

NOTE - This particular post by far the most popular entry for 2010 on this Wonder of Water blog. I'd love to know why. Please add your thoughts below.

It happens in coffee shops day and night around the world . . . 

It wafts from the breath of every person on the planet . . .    

Mist rises from golf courses and wetlands ... Steam soars from industry stacks and tree-tops ... 

Water evaporates from the Bay of Bengal and transpires from plants.

Evapo-transpiration feeds the hydrologic cycle – that process that circulates water, purges the air and nourishes life on earth.