Officials of the National Norm and Standard Department say that this department has returned 75 oil tankers to the Islamic Republic of Iran in the past week due to low quality.

Following a number of citizens' complaints about air pollution in the capital, the National Environmental Protection Department says that the use of smoky fuels, high prices of petroleum products, smoky vehicles and lack of sufficient electricity have caused an increase in air pollution in the capital. But they force high-rise buildings to use purifiers ...