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This data is taken from table number 15-4 from page 233 of the report Demographic indicators 2 - 2020.

This data is taken from table number 15-3 from page 232 of the report Demographic indicators 1 - 2020.

This data is taken from table number 15-2 from page 231 of the report Population of cities - 2020.

This data is taken from table number 15-1 from page 230 of the report Population of Tehran province - 2020.

This data is taken from table number 14-10 from page 216 of the report The volume of collected wastewater and urban treatment - 2020.

This data is taken from table number 14-9 from page 215 of the report The total number of subscribers and active urban households - 2020.

This data is taken from table number 14-8 from page 214 of the report The ratio of the population covered by municipal wastewater collection and sanitary disposal services to the total population - 2020.

This data is taken from table number 14-7 from page 213 of the report Production waste volume - 2020.

This data is taken from table number 14-6 from page 212 of the report The number of active air pollution measurement stations in cities with a population of over 100000 - 2020.

This data is taken from table number 14-5 from page 211 of the report Ratio of clean and unhealthy air days in Tehran - 2020.

This data is taken from table number 14-4 from page 211 of the report Soil erosion rate - 2020.

This data is taken from table number 14-3 from page 210 of the report The area of fire-affected forests and its share - 2020.