Which elements of the physical environment are emphasized in the portrayal of various places on television?
As the first answer says, this is very broad. If you give more information about what you are asking, we will be able to give you better answers.
I agree with what the previous answerer said, but would like to go beyond it.
I would argue that TV programs' portrayal of the physical environment depends on what the purpose of the program is.
It is certainly true that more attention is paid to the fragility of the environment. But this is seen mostly in documentary programs or other non-fiction type programs. These generally are trying to make a point about the need for conservation.
In contrast, travel programs want to persuade you to travel. So they emphasize the grandeur of the physical environment or its exoticness -- things that migh make you want to go see those places.
Finally, think about "Survivor." In that show or shows like it, the harshness of the environment is emphasized. We're being encouraged to think of "man" against nature.
So -- I don't know which of these kind of shows you're supposed to be thinking about. But depending on what kind of show it is, the environment is portrayed differently.
This is an extremely broad question, because there is so much on TV. There are shows that take place in a person's apartment and there are show about nature. And there is everything in between.
However, there does seem to be a trend on TV that is aware of the problems of the environment. We see this on advertisements as well as the news and even in some entertainment programs. I suspect that this is so, because there is a general awareness of the frailty of the environment.