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Iran Open Data’s research reveals that over the past 75 years, the average temperature in Tehran has risen by more than three degrees Celsius, increasing from around 16°C in the 1950s to over 19°C today. This significant rise highlights the impacts of long-term climate change on the city. Tehran has

This data is taken from table number 13 from page 23 of the report Wastewater - 2018.

This data is taken from table number 12 from page 22 of the report Water - 2018.

This data is taken from table number 8 from page 16 to page 17 of the report Tax revenues - 2018.

This data is taken from table number 7 from page 18 to page 19 of the report Index of the total business environment - 2018.

As the country grapples with water scarcity, the number of legally constructed deep wells has increased by 40%, and semi-deep wells by 1.5 times. However, the wells’ water production has decreased by 15%, Iran Open Data research shows.The Statistical Center of Iran’s yearbook states that the number

The drying up of Lake Urmia, a crucial aquifer in Iran’s northwest, is most often attributed to drought, illegal use of underground water, and excessive production of watermelon, sugar beet, and apple in West and East Azerbaijan provinces.Iran Open Data’s research shows that there is a direct relati

Weighted against the size of its economy, the intensity of greenhouse gas emissions in Iran is approximately three times that of China and more than ten times that of the United States, according to the latest European Union statistics. While globally, an average of 0.5 tons of greenhouse gas i

This data is taken from table number 6 from page 6 of the report Calculation of data related to the country's sewage network - 2017 - 2022.

This data is taken from table number 4 from page 4 of the report The number of municipal sewer subscribers - 2022.

This data is taken from table number 5 from page 5 of the report Calculation of data related to the countrys sewage network - 2017 - 2022.

This data is taken from table number 3 from page 3 of the report The population covered by municipal wastewater collection and sanitary disposal services - 2022.