less hair than I used to have.We use less of something with non-countable nouns: 'less sugar, less hair, less time'. You can only have fewer items of a plural/ countable nouns: 'fewer people, fewer cars, fewer shops'.You can have less money, but you can't have less five pound notes. You have fewer five pound notes! So in the supermarket the checkout sign should read: ‘10 items or fewer’ and not ‘10 items or less’ Try the exercise below using only fewer or less in your answers. Good Luck! Key Words Traffic - (noun) the amount of cars on the road.Pollution - dirty air, water or land. Usually caused by waste. The verb is to pollute. Luggage - (noun) bags or baggage.