The Organization of Petroleum Exporting Countries (OPEC) implemented an oil embargo in October 1973, prohibiting nations that supported Israel in the Yom Kippur War from purchasing its oil. This led to a 400% increase in oil prices from $2.59 to $11.65 per barrel and high inflation in consuming countries. Western nations responded with measures like fuel rationing and restrictions on driving and flying to reduce energy usage, while also encouraging growth through interest rate cuts. The embargo motivated searching for renewable fuels and was lifted in March 1974 after negotiations.