smog – n. fog or fog combined with smoke and other pollutants

garbage – n. wasted food and other refuse

kids – n. children

infrastructure – n. the basic equipment and structures that are needed for a country or area to operate

source – n. a person place or thing from which something comes

ward – n. a separate room or area in a hospital

capacity – n. the largest amount or number that can be held or contained

awareness – n. knowledge or recognition

unfortunately – adv. sadly, regrettably

challenge – n. a problem or test