Lines prompted by a Greenpeace postcard, picturing a mother polar bear with her two cubs

Three bears appear at once,
Challenge and censure the dunce
And show what we shall lose
Unless we stop and choose
To counter those whose goal
Neglects the dreadful toll
That greed, when uncontrolled,
Exacts, with grief untold.
Give, then, the Earth our care,
And hasten its repair,
So life unique remains
To justify our pains,
And recognize anew
The cosmos has its due.