By exposing them to the vagaries of human behavior and endangering them by the changes that man has made to the physical world, we are accountable for the harm we inflict on other species. We compete fiercely with them over habitat and since we are technologically advanced and they are not, we easily prevail over them. We have literally pushed them to the brink of extinction as a result of our voracious appetite for seemingly endless development, to satisfy our own wants and supposed needs. Hence we are morally responsible to ensure their welfare and their survival.