Why do people love nature? I wonder why we feel happy and comfortable when seeing the view of trees, green plants and flowers. Why do we admire sea, waves, fishes inside pure water and sun set? why do we love seeing the view of sky, moon and stars? Why people love nature even it is not real like a Picture on a computer?

To be more clear, People love seeing sea but the don't feel the same when they see a cup of water although they both are water.

Is it pure psychological reason? or There are some other biological reasons or chemistry of the brain?

Thank you very much,
People love nature because truth, nature/natural experience, and reality go hand in hand. Nature provides serenity, beauty, and calm. Our world of experience is what gives us, and provides for, life. Ultimately and fundamentally, the integrated extensiveness (and sensibility) of being and experience go hand in hand, as the self represents, forms, and experiences a comprehensive approximation of experience in general by combining conscious and unconscious experience. In fact, we always begin with typical/ordinary and common experience in establishing physical fundamentals/truths. Experience is the best teacher, and the creations of our thought that replace nature/natural experience, such as TV and mirrors, maximally reduce the integrated extensiveness of space/our experience. A true, extensive, integrated, and natural balance of being and experience is best. Balance and completeness go hand in hand. If we walk away from reality, reality walks away from us.