The World Has Cancer

Comment from student after viewing Joel Kovel in the video A Really Inconvenient Truth:
I remember the speaker was talking about how the world in a sense has a cancer and that we need to get rid of it in some way and not just go home and do little things. But i wonder if really, in a sense, humans Are the cancer, and if we are indeed getting rid of cancer, are we not really getting rid of ourselves? He explains that the growth of capital is the death of nature but nature lives and dies and eventually all things have to die, humans are just advancing it and capital is probably not the only reason for nature dying.