Title: Optional activities about the videos related to the pho thermal and photovoltaic use of solar energy
Course: Let's talk about energy resources > Section: Renewable energy resources

Watch the videos again:

Photo thermal use: https://www.youtube.com/watch?v=FgjfJGfusdE

Photovoltaic use: https://www.youtube.com/watch?v=gl5tY5Noacc