renewable energy

This term is used primarily in environmental, political, and technical discourses to describe power sources that do not deplete over time. It carries a strong positive connotation of sustainability and ecological responsibility, often contrasted with "fossil fuels" or "non-renewable energy."

Grammatically, this is an uncountable compound noun. It refers to a general concept or a category of energy rather than individual units. Consequently, it does not have a plural form and is used with singular verbs and uncountable quantifiers such as "much" or "a great deal of."