An environment is something that is external to a living being and it is simply all the physical, chemical, and biological factors surrounding it. This includes all living and nonliving things.
An environmental photograph is a photograph that describes an environment, its happenings, scenes in and around it and it can be photographed in many ways and for many reasons. To explain in the simplest form, any photograph that you capture of an environment is called environmental photography, but we shuold make sure it is meaningful, addresses an issue, or tells a story, message.

Street photography is a visual documentation of everyday life and society. It’s commonly referred to as a candid representation of humanity, however, a person doesn’t need to be in an image for it to be considered street photography. This type of photography takes place exclusively in public areas, albeit not necessarily on the street.
Street photography usually captures an unplanned moment in time and, unlike documentary photography, does not have a main subject or subject. That said, street photographs can and often do "acquire" value as documentary images, especially over time, as they can offer glimpses of a scene from the past and form fragments of social history.