Environmental issues in Iran include, especially in urban areas, vehicle emissions, refinery operations, and industrial effluents which contribute to poor air quality. Most cars use leaded gas and lack emissions control equipment.Tehran is rated as one of the world’s most polluted cities. However, buses and cars running on natural gas are planned to replace the existing public transportation fleet in the future. Also, energy prices are kept artificially low in Iran through heavy state subsidies, resulting in highly inefficient and polluting consumption patterns.Traffic management, vehicle inspection, general use of electric bicycles and electronic government are also part of the solution.
A rising incidence of respiratory illnesses prompted the city governments of Tehran and Arak, southwest of the capital, to institute air pollution control programs. These programs aim to reduce gradually the amount of harmful chemicals released into the atmosphere.
Much of Iran’s territory suffers from overgrazing, desertification and/or deforestation. Industrial and urban wastewater runoff has contaminated rivers, coastal and underground waters. Wetlands and bodies of fresh water increasingly are being destroyed as industry and agriculture expand, and oil and chemical spills have harmed aquatic life in the Persian Gulf and the Caspian Sea. Iran contends that the international rush to develop oil and gas reserves in the Caspian Sea presents that region with a new set of environmental threats. Although a Department of Environment has existed since 1971, Iran has not yet developed a policy of sustainable development because short term economic goals have taken precedence.