I want to know the answer to the following question:
What sources of energy does Switzerland heavily rely on?
All the background I'm provided with is that "Nevertheless, according to the 2014 Environmental Performance Index, Switzerland ranks first among 132 nations in safeguarding the environment, due to its high scores on environmental public health, its heavy reliance on renewable sources of energy (hydropower and geothermal energy), and its control of greenhouse gas emissions.". Is that enough to answer the question?
Answer: yes