This morning I woke up and went to hang some laundry outside and it was georgous weather. There was a nice breeze, the sun was just coming up and... just beautiful. I'm sure you can imagine it. Both my hubby and I love to open the windows a few times a week and let the sunshine come in. Our house isn't facing the sun but we still get some light that comes in.
Not only is it beautiful but there is also studies that show that it clams you down, helps you be more products and happy. When natural light is used in school (which come to think of it, there are no windows in my daughters school, except for the library and cafeteria!) there is better attendance and less trips to the principles office. It also has its health benefits as well.
So take some time to Open a Window! It won't kill ya.