The living environment of people and cats should be ventilated, so that people and animals can have a good living environment. Cat owners usually pay attention to ventilation when placing litter boxes. The litter box is where cats go to the toilet to excrete. If there is no ventilation for a long time, the cat will be unbearable and may choose to abandon the good habit of going to the toilet in the litter box. Cat owners also feel uncomfortable when shoveling cat droppings. In the long run, people and animals are in a bad mood.