it means not harming the earth in production, and having it be all natural ingredients, also giving back to the earth in the prosses
In some way it is more safe for the environment than what the average item of that making is...
It means that you will be able to shoot anywhere in the room without having to use a cut down cue.
"user friendly" means that the software or device is easy to use, and that the person using it won't have a hard time learning how to use it or have problems while using it.