Clean is more than green. Clean technology, or "cleantech", should not be confused with the terms environmental technology or "green tech" popularized in the 1970's and 80's. Cleantech is new technology and related business models offering competitive returns for investors and customers while providing solutions to global challenges -- often related environment or energy related.

The concept of cleantech embraces a diverse range of products, services, and processes across industry verticals that are inherently designed to,

• Provide superior performance at lower costs
• Greatly reduce or eliminate negative ecological impact
• Improve the productive and responsible use of natural resources

Cleantech spans many industry verticals and is defined by the following eleven segments,

• Energy Generation
• Energy Storage
• Energy Infrastructure
• Energy Efficiency
• Transportation
• Water & Wastewater
• Air & Environment
• Materials
• Manufacturing/Industrial
• Agriculture
• Recycling & Waste