Is this for security, green or something Illegal ?

I can’t figure this one out. It is in a bad neighborhood. It’s the street I grew up on. We had to chain our car batteries down and we also left our cars unlocked so they wouldn’t break the windows. I can’t figure out what this is. Maybe they got some kind of illegal lab operation in there. Click on these small photos for a bigger one.

Here is the house.

Here is a close-up of those windows.

Here is a close up of the front door. It looks like the door on a freezer or a container for a bomb. this  question if it’s an illegal lab operation.

I thought it might have been some new “GREEN” stuff, but I see a very old air conditioner is still in place.