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An annual volume of 182.3 million cubic meters of surface runoff contaminated with Tehran's effluent is being utilized by the agricultural land of southern Tehran province. The experimental method was used to express the monetary effects of irrigation water. For this purpose, five environmental impacts including soil contamination, water contamination, unpleasant smell, contamination of the product and available water content were considered. The most important feature from the viewpoint of farmers is the amount of water available. Farmers have evaluated the worth of this property as 36 rials per cubic meter of water. Then, the soil contamination value of 35 rials per cubic meter of water was the second priority from the viewpoint of farmers. The results showed that farmers are willing to change the conditions, but if they do not provide a program for farmers, they will be satisfied with the current situation and will benefit from contaminated water. On the other hand, with increasing ethical tendencies of farmers, their attention to the health of the product and therefore the health of consumers of agricultural products will increase. Farmers are willing to pay 190 rials per cubic meter of refined waste, which is also more than the cost of a healthy water channel, which is currently 130 rials.

Oil products and electricity are the main sources of energy for the agricultural sector of Iran. In the period 1989-2012, the use of this energy carrier has increased at an average rate of 35.6%, whereas the average annual growth rate of the value added of the agricultural sector has been 3.31% over the same period and the productivity trend of energy carriers has always been on a fall so that their average annual growth rate in the agricultural sector of Iran has been -14.33%. The present study aimed to explore the effectiveness of energy productivity on the added-value of the agricultural sector. The results showed that the two variables had no causal relationship. It can thus be said that other factors are influential on the added-value of the agricultural sector and that for the productivity of energy carriers to be influential on the agricultural sector, it is necessary to examine a combination of pricing and non-pricing policies.