I'm sorry, but last I checked the United States which has massive amounts of oil is also looking for alternative energy. The fact is the future is in other energy sources and Iran knows this and is preparing for it. What they're just supposed to sit and wait for thei oil to run out?
Russia: U.S. plan to provide air cover for Syrian rebels undermines Damascus fight on ISIS (Reuters)
from the article: ANALYSIS: Iran likely to push the boundaries of nuclear issue