What is meant by " Environment Ethics?

according to (Stanford Encyclopedia of Philosophy) they say

Environmental ethics is the discipline in philosophy that studies the moral relationship of human beings to, and also the value and moral status of, the environment and its nonhuman contents. This entry covers: (1) the challenge of environmental ethics to the anthropocentrism (i.e., human-centeredness) embedded in traditional western ethical thinking; (2) the early development of the discipline in the1960s and1970s; (3) the connection of deep ecology, feminist environmental ethics, and social ecology to politics; (4) the attempt to apply traditional ethical theories, including consequentialism, deontology, and virtue ethics, to support contemporary environmental concerns; and (5) the focus of environmental literature on wilderness, and possible future developments of the discipline

read more at http://plato.stanford.edu/entries/ethics-environmental/

Environment Ethics refers to culture of office, home and external influences.