AIR

Fill in these adjectives on the blanks:
invisible, diffuse, controllable, ecological, understood, shared, mysterious

Respiration is an ______________ act. We inhale a pint of atmosphere with every breath. And yet, of all the component aspects of our environment, air remains ______________.
Air is the element most ________________, most __________, most _____________, least _____________, least _______________.

This passage is from Sandra Steingraber's book "Living Downstream" (Da Capo Press 2010)

SOLUTIONS: ecological, mysterious, diffuse, shared, invisible, controllable, understood.