THE SIMPLE REASON IS THAT IT IS VERY VALUABLE .ITS VALUE CAN BE VIEWED FROM TWO ANGLES:-
*INTRINSIC VALUE : -
THIS VIEWS HOLDS THAT BIODIVERSITY HAS AN INTRINSIC VALUE THAT IS WORTH PROTECTING REGARDLESS OF ITS VALUE TO HUMANS.
THE INTRINSIC VALUE OF BIODIVERSITY
*INSTRUMENTAL OR HUMAN-CENTERED VALUES : -
THE SECOND VIEW IS THAT BIODIVERSITY HAS INSTRUMENTAL VALUES, THAT IS, IT IS USEFUL TO HUMAN BEINGS.
THE INSTRUMENTAL VALUE OF BIODIVERSITY