Question

From the three-year period of 2012 to 2015, new renewables jumped from 1.9% to 2.4% of U.S. energy consumption. If this rate of change were to continue, in approximately what year would the use of renewables exceed 10% of total energy consumed?

Answer 1

If the rate of energy consumption change were to continue, then in 2061 the use of renewable energies would exceed 10% of the total energy consumed.

How do you calculate energy consumption change?

In this case, it is possible to calculate the energy consumption change as 1.9% to 2.4% (0.5%) in three years >> 0.1666 per year.

And therefore 2060 - 2015 = 45 years >> 0.16666 x 45 = 7.5% energy consumption change and therefore 7.5 %  = 2.5% = 10% (2060).

If this rate of energy consumption change were to continue, then in 2061 the use of renewable energies would exceed 10% of the total energy consumed.

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