IRNA � Top Iranian nuclear official on Tuesday hailed Iran's scientific progress and urged cooperation with the world states in all fields.

Engagement with the world is inevitable for all countries; economic development and progress in fields of science and industry is not possible without engagement with the international community, Head of the Atomic Energy Organization of Iran (AEOI) Ali Akbar Salehi said.

He made the remarks in a ceremony held to celebrate 40 anniversary of Islamic Revolution.

The 10-day period from the Imam Khomeini's return on February 1, 1979, until the revolution�s victory on February 11 is celebrated in Iran annually and is dubbed as the Ten-Day Fajr (Dawn).

In economic field, government should decrease its reliance on oil revenues and focus on boosting the national production and export of Iranian made precuts abroad, the official added.

He said that Iran and Iranians gained much respect in the world after the Islamic Revolution in Iran.