Environment is larger scale than the imported model

Hi, I am importing model from Rhino that is drawn in normal size. The model looks tiny with the background. How can I scale the background or the model so it looks the same size? Also I have problem with another model that is flying in the air instead of being on the ground. What can I do in that?

Try changing the camera fov parameter and the camera direction to see if you can find the right balance between model and environment, otherwise try using a different environment.