Clean Technology (CleanTech) refers to any product, service, or process that measurably enhances environmental sustainability and resource efficiency.

CleanTech is an umbrella term encompassing renewable energy, green building, sustainable transportation, and advanced pollution control.

Unlike traditional "end-of-pipe" solutions, it focuses on innovation-driven solutions that provide competitive economic returns while significantly reducing ecological impacts. For instance, includes technologies like smart grids, carbon capture and storage (CCS), and highly efficient materials that tackle the intertwined issues of climate change and resource depletion.