Mankind is a Disease

Mankind is a disease.
It spreads like a tainted spirit.
Mankind's touch rots land and trees.
Crumble! As the world begins to seize.

Death spreads far and wide.
It takes life like the grim reaper. 
The human race must decide.
Click! A bright idea to run and hide.

Run, hide, escape, survive.
Live like the last green leaf in winter.
The human race must stay alive.
Click clock! The human race waits to thrive.