Question

In Asia, for which fuel does the proportion in the total energy demand decrease continuously over the period 1991-2011?

• A. Naphtha
• B. Solids fuels
• C. Nuclear fuel
• D. Hydro energy

Answer 1

The correct option is D

Hydro energy

For the answer choices given and for Asia we can make the following table.
$\begin{array}{ccccc}& & 1991& 2001& 2011\\ & \text{Total energy}& 10& 20& 33\\ \text{Naphtha}& \text{Value}& 0.5& 2.5& 5\\ & \text{Proportion}& 5\%& 12.50\%& 15.15\%\\ \text{Solid Fuels}& \text{Value}& 4& 5& 10\\ & \text{Proportion}& 40\%& 25\%& 30.30\%\\ \text{Nuclear Fuel}& \text{Value}& 0.5& 1& 1.3\\ & \text{Proportion}& 5\%& 5\%& 3.90\%\\ \text{Hydro Energy}& \text{Value}& 1& 1.5& 2\\ & \text{Proportion}& 10\%& 7.50\%& 6.06\%\end{array}$
Hence, we can see that the proportion of Hydro Energy goes on decreasing over the given period.