5 Match the words. Then, use the phrases to complete the sentences. 1 insect 2 breathing 3 dust 4 cleaning 5 air-conditioning a mites b filters с sprays d problems e products 1 Excessive use of cleaning products causes air pollution. 2 Using sticky traps instead of insect sprays can help reduce pollution. 3 Dust mites that live in carpets and mattresses, are known to cause allergies, 4 If you want to be sure to keep the air in your house fresh, you need to clean or replace your air- conditioning filters regularly. 5 Some doctors believe that having a cat in the home is the cause of breathing problems for many people.