the un left out environment because

During the time the declaration of human rights was written the world was much different than it is today. It was written after world war 2 and the set of problems that they had at that time are different than the ones that we have today. in the 1940's the environment was not on the top of the list of priorities, they were more focused on not having any more genocides. Global warming has to do with the environment,and global warming has only just become a serious issue recently. They also didn't put any rights to the environment because it is not a person, if they were to write something to protect the environment it would have to be a law against doing something, not a right that someone would have.