Some critics of the Iranian government contend that it is carrying out a policy of anti-Arab ethnic cleansing. While there has been large amounts of investment in industrial projects such as the "Razi Petrochemical Complex", local universities, and other national projects such as hydroelectric dams (such as the Karkheh Dam, which cost $700 million to construct) and nuclear power plants, many critics of Iran's economic development policies have pointed to the poverty suffered by Arabs in Khuzestan as proof of an anti-Arab policy agenda. Following his visit to Khuzestan in July 2005, UN Special Rapporteur for Adequate Housing Miloon Kothari spoke of how up to 250,000 Arabs had been displaced by such industrial projects and noted the favorable treatment given to settlers from Yazd compared to the treatment of local Arabs.