After representing his country Iran in the last Venice biennial, he rose to fame. Since then, through his work Nadalian has communicated themes that he believes are fundamental for humanity: respect for the environment, new technologies and freedom of expression, blending of tradition and contemporary art forms, natural disasters, the vulnerability of humankind and the global issue of terrorism.

In his work Paradise, a viewer can visualise the composition of the flora and fauna of an imaginary heavenly atmosphere on digital system. To quote Nadalian, "Paradise presents the ideal state of the earth. I'm a believer of Sufism. I believe that the essence of Allah can be found in the beauty and harmony of man and nature. And my display represents the theme."

During his short visit to Dhaka, Nadalian has carved a few stones at Shilpakala Academy and later he has dropped them in a pond at Sonargaon, to preserve them in the midst of nature. Nadalian says, "Creative people incorporate elements from nature, while my approach is to enrich nature. This motivated me to carve stones and later hide or bury those in the midst of nature."

"I leave my contact numbers and website address (www.riverart.net) on these stones, yet have no inclination to disclose their exact whereabouts. What I intend is for the spectator searching for the artwork to perhaps discover something more valuable than my stones in nature. I consider myself a partner in the spectator's findings."

A good number of small-carved stones by Nadalian have been hidden or buried in different countries such as France, USA, Australia, Burkina Faso, Chad, Egypt, Greece, UK, Finland, Morocco, South Korea, Japan, Ireland, India, China, Russia, Brazil, Uzbekistan and others. These mostly depict images of fish, human hand and foot traces.

Nadalian's carved stones are based on primitive art. He concentrates upon the ancient Persian and pre-Islamic concepts and methods that are on the verge of extinction. His choice of stone as a medium, and his technique, are in accordance with ancient traditions.

Yet he does not attempt to give a primitive appearance to his art. His technique is different from ancient methods. The presence of newborns in his work testifies to his interests; he is drawn not only to the past, but also to the future. Nadalian said, "Figures already exist in nature. It is not my mind alone that selects the forms from nature. These forms, products of nature's harmonious structure, also have selected me, and teach me how to see. I accept the natural structure, and abide by its rules.

Thus my works depict the balance and flow of nature."

His permanent exhibitions include the carving on rocks that can be seen in many countries such as Italy, Germany, USA, Spain, France, Uzbekistan, Lebanon and Iran.

Nadalian's talent has won recognition. He has been introduced as one of the world's leading environmental artists by Edward Lucie Smith in his recent book Art Tomorrow. Moreover, his life and artistic activities in Iran and abroad have been the subjects of documentaries by filmmakers such as Mojtaba Mirtahmasb. His environmental works have also been recorded by Fergus Meiklejohn, Catherine MacDonald and Vesta Mauch. In addition many TV reports and interviews have focused on Nadalian's environmental works.