Cleantech describes products or services that improve operational performance and efficiency while reducing energy consumption, wastes, or environmental pollution.

This industry is driven by the increased interest in clean forms of energy and by the rise in awareness of climate change. Many clean technologies offer significant benefits, such as their ability to improve the lives of those in both developed and developing countries. In 2008, clean technology venture investments in North America, Europe, China, and India totaled a record $8.4 billion.