Table 2 Results of assessing the status of litter in the public environment in some studies.

From: A case study on litter management and clean environment index in small tourism cities

Study location

Remarks

References

Argentina

• 20,336 litter items were counted in four areas of a coastal city.

• The most common litter item was cigarette butts, which included 33% of all counted litter items.

• Urban land-use had a significant impact on the composition and density of litter items.

26

Germany

• The density of littered cigarette butts was studied in Berlin.

• The density of littered cigarette butts was 2.7/m2 of the studied area, while in the most polluted area 48/m2 cigarette butts were observed.

• The nicotine leakage from each cigarette butt was reported by 7.3 mg/g.

• Educational campaigns are essential to reduce cigarette butt disposal.

18

Spain

• The density of littered cigarette butts was studied in Madrid.

• The density of littered cigarette butts was higher in shopping malls and city centers.

• Places such as urban transport stations were more polluted.

• GIS provided reliable results of the density of discarded cigarette butts in urban environments.

28

Japan

• Littered waste in the roadside environment of a Japanese city was studied.

• The average density of littered waste was 220 items/km.

• The most frequently observed litter were paper and cigarette butts, which were 90 g/month/km.

• The potential for heavy metal leaching from littered waste was 0.02–1.7 mg/km/mo.

29

Iran

• Littered waste on the coast and in the urban environment was studied in Rasht, south of the Caspian Sea.

• About 40% of the littered waste consisted of plastics.

• The density of littered waste on the coast was higher than in the urban environment due to the lack of a regular cleaning system.

• According to the CEI, 60% of the coasts and 50% of the urban environment were in a dirty status.

8

Ardakan, Iran

• The density of the littered waste was 0.309-0.953 items/m2.

• The density of the littered waste was affected by seasonal changes and land-use.

• Cigarette butts were the most abundant littered waste, comprising 55% of the total littered waste.

• The calculated CEI at different locations ranged from 6.8 to 34.15, which was higher than other reports in other Iranian cities.

This study