The 1970 s energy crisis occurred when the Western world, particularly the United States, Canada, Western Europe, Australia, and New Zealand, faced substantial petroleum shortages, real and perceived, as well as elevated prices. The crisis led to stagnant economic growth in many countries as oil prices surged. The two worst crises of this period were the 1973 oil crisis and the 1979 energy crisis, when the Yom Kippur War and the Iranian Revolution triggered interruptions in Middle Eastern oil exports. India too faced oil crisis during this period.