The Environment (Room in The Sims) meter is often overlooked. It basically states how aesthetically pleasing the room is to the Sim. Nothing drastic will happen if it drops, although if kept high the sims' mood will be better. This meter, along with Comfort, is nonexistent on toddlers and children in The Sims 2
 How To Resolve
Sims dislike small dark rooms, with no decorative features. They also dislike garbage and uncleanliness, such as dead fish in the aquarium, or unwashed plates in the kitchen. As a general rule, bright, large and clean rooms will keep a Sim happy, and the Environment motive up.
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