To find the correct percentage by which the use of solar power is increasing annually, we need to look at recent trends and data in renewable energy growth. It has been observed and documented that the use of solar power has been growing significantly due to advancements in technology and increased investments in renewable energy sources.
Considering the multiple choice options given:
- a. 5 percent per year
- b. 10 percent per year
- c. 15 percent per year
- d. 25 percent per year
We need to determine which of these percentages accurately reflects the actual growth rate of solar power usage per year.
From the available data and information, it has been established that solar power usage is increasing mostly by 15 percent per year. This reflects a substantial growth rate, driven largely by improvements in solar technology, reductions in cost, and higher adoption rates.
Thus, the correct answer is:
O c. 15 percent per year
