Ultra Key - background mixes with people

A handy phrase to remember when planning a "green screen" shoot: Blue is for blonds.  Of course, if your actors need to wear blue (which your subjects are) you add another level of complexity to pulling your key.

Like shooternz mentioned, ideally your actors would be further away from the green screen, far enough away that you are able to light the green screen separately from them.

Shadows on a green screen/blue screen can also be problematic if not well planned for.  Based on the city image being used for the background in your screenshot, you would want no shadows on the green screen.

As shot, you're probably going to have to keep some of the shadow when pulling the key.  If your background was a brick wall directly behind your subjects, this would work.

It's a green screen. Then I use the eye-dropper selecting green. Then when you do this, it turns the background black. This is correct form the videos I've seen. But on videos, they then insert a pic or video below the green scene footage. When I do this, my two actors are not clean, they have part of the city (the pic I chose) mixed in with them. Here is before eyedroper. what it looks like