  An important limitation of this model is that it does not simulate changes over time in the demand for electricity, prices, technology, or other factors considered within IPM.
The model is limited by the fact that it doesn't similar change over time.
The model has no limits.
A man is traveling.
There is a summary of the real property that Americans own elsewhere in the world.
The man is smoking a cigar while fixing the broken down car for two clients along the side of the highway
a man is sleeping in a forest
The dog is sleeping on the carpet.
a football player is dancing