The demand of energy in world become double: Every year Every 5 years Every 10 years Every 14 years

The question seems to be asking how often the demand for energy in the world doubles. However, the information provided is not sufficient to give a specific answer. The rate at which energy demand increases can vary greatly depending on a number of factors, including population growth, economic development, technological advances, and energy efficiency improvements.

According to the International Energy Agency (IEA), global energy demand is expected to increase by 1% per year until 2040. This is less than half the average rate of growth since 2000. At this rate, it would take approximately 70 years for global energy demand to double.

However, this is just an estimate and the actual rate could be higher or lower depending on the factors mentioned above. For a more accurate answer, you would need to refer to detailed energy demand forecasts from reliable sources.