请用英语回答以下问题，并且包含三个要点，不少于50个单词，不多于100个单词。

What are the three types of renewable energy?
user
Renewable energy sources include three primary types: 
1. **Hydropower** which harnesses the energy of flowing water to generate electricity, 
2. **Solar energy** that uses the sun's radiation to produce power, and 
3. **Wind energy** which converts wind's kinetic energy into electricity using turbines. These sources are sustainable and environmentally friendly.
assistant