Practical, globally-scalable and cost-effective technologies  

“Clean Technologies" or "Cleantech” are evolving industry definitions for companies and technologies focused on sustainability. Broadly defined, sustainability refers to environmental impact neutrality, a process which can be replicated with practically no negative impact on the environment. Most current market solutions use the "sustainability" or "clean" designation when greenhouse gas emissions and other negative impacts are nullified and/or reduced.  The traditional sustainability sectors which comprise Clean Technologies are: renewable energy, energy storage, energy efficiency,  and environmental remediation:

Renewable Energy

• Solar

• Wind

• Geothermal

• Hydro

• Biomass

• Biofuels

• Wave & Tidal

 Energy Storage

• Batteries

• Fuel cells

• Pumped hydro

• Sitable hydro

• Synthetic fuels

• Thermal storage

• Ultra capacitors

Environmental remediation

• Toxic substances reduction

• Wastewater treatment

• Potable water purification

• Recycling

• Nuclear fuel cycle

• Solar Radiation Management *

• Carbon Dioxide Removal

Energy Efficiency

• Thermal insulation

• Lighting

• Water distribution

• Electric transmission

• Transportation

• Sustainable construction

• Power management

Many of the segments above have few practical or cost effective solutions in the market today.    The sectors marked "*" are for non-profit multilateral efforts.