What is an environmental portrait?
An environmental portrait is a portrait of someone who has been taken in their place of work, which is the subject's usual environment. This can be their home or workplace, but usually within the image, it reflects and illuminates the person's personal life, seen through the surrounding objects within the picture itself.
One photographer who does this is Sally Mann, as seen in her photos like the one below called 'Candy Cigarette'.
Within environmental portraits the subject tends to have a relaxed and calm face, in order to create an effect inside the image itself, whilst allowing the image to be emphasized due to its dramatic characteristics.
Sally Mann tended to focus on a individual face within her images, to really make out the backgrounds of the character within, allowing us to see the conditions many of the subjects were brought up in.