The pie charts depict the shares of various power generation technologies in the total electricity generation of a country for the years 2007 and 2023.
The renewable sources of electricity generation consist of Hydro, Solar and Wind. Assuming that the total electricity generated remains the same from 2007 to 2023, what is the percentage increase in the share of the renewable sources of electricity generation over this period?
Answer
(D)
Explanation
Add the renewable shares (Hydro, Solar and Wind) for each year:
- 2007: \(30\% + 5\% + 5\% = 40\%\)
- 2023: \(35\% + 20\% + 10\% = 65\%\)
The total generation is the same in both years, so the shares can be compared directly. The percentage increase is
\[\frac{65 - 40}{40} \times 100 = 62.5\%.\]
Option A (25%) is the rise in percentage points, not the increase relative to the 2007 share.
Answer: D