Without sufficient details, I'll have to take out my crystal ball and conjure up some possibilities.
So here they are:
1. If you had a film camera, I would suspect the slight possibility of a light leak somewhere along the line, because of the "fog"/discoloration (green and other colors) near the center of the photograph which are running in a vertical position - top to bottom;
2. Since you - apparently - are using a digital camera, one might suspect "flare" due to the internal elements of the lens reflecting to and fro within the lens elements. One would normally find this type of internal flare when shooting into or near into a light source or the sun. Unfortunately, it appears to be an overcast day and that cause can be elminated, except for the roundish red spot near the bottom of the photograph, which does make it puzzling.
If this is on the negative or on your digitial image, then I suspect that something internal is amiss.
3. However, if this shows up only on the print, then somewhere along the printing, developing, etc. process, something went amiss in which case, you should contact the facility that printed this and inquire as to a solution.
Hope this crystal ball analysis is somewhat useful.
Bill