The sun produces both light and heat, which are used in two different types of solar energy systems -- solar thermal and photovoltaic.
(The sun; produces; both light and heat, which are used in two different types of solar energy systems -- solar thermal and photovoltaic) (both light and heat; are used; L:in two different types of solar energy systems -- solar thermal and photovoltaic)
The sun both light and heat
produces are used
both light and heat, which are used in two different types of solar energy systems -- solar thermal and photovoltaic
L:in two different types of solar energy systems -- solar thermal and photovoltaic