With our knowledge, our technology, and our large numbers we humans can affect the living conditions for all the other organisms we share the earth with, and for our self. We can exterminate species, destroy habitats and even change the climate on earth.
This impose us humans an enormous responsibility for our fellow creatures. In which entitlement can we destroy other species? As the most intelligent being on earth so far being evolved wouldn't it be more appropriate to do our utmost to save other living species from extinction?
We also have a large moral responsibility for our descendants. If we remove species from the earth it will give our descendants fewer possibilities and experiences. Do we have the right to deny future humans the possibility to experience arctic fox, common coltsfoot, salmon or the Lesser White-fronted Goose? Or for that matter, bears and wolves? Important food resources, raw materials and medicines can also be lost when species disappears.
Today's humans have a responsibility for nature and our descendants, to protect the biological diversity as intact as possible.