Nature photography refers to a wide range of photography taken outdoors and devoted to displaying natural elements such as landscapes, wildlife, plants, and close-ups of natural scenes and textures.
Urban nature is therefore an initiative that will just concentrate mainly in city environment but applying the principles to its shooting.
Nature photography tends to put a stronger emphasis on the aesthetic value of the photo than other photography genres, such as photojournalism and documentary photography.
Being a big fan of nature and urban environment I'm obviously tempted to observe and capture nature beauty on a regular basis. Despite the fact that I'm not a macro photography specialist, I have created an interesting portfolio of pictures of flowers but also trees.