Tertiary treatment solutions - Solutions that provide a final treatment in order raise the effluent quality of the water before it is discharged into the receiving environment.

Thermal coal - All other coals that are not classified as metallurgical or coking coal. Coals of these type are usually low in grade and are commonly burned in power plants to generate electricity. Also known as steam coal.

Thin film - Technology that utilizes thin layers of material for electronic semiconductor and optical applications. Thin film is used in second and third generation photovoltaic technologies and often applied for building integrated applications.

Third generation biofuels - Processes that involve the production of biodiesel from algal oils. Energy derived from algae crops is substantially greater (up to 30 times) than second generation biofuel crops.

Time-of-use (TOU) pricing - Cost system wherein the price of electricity is established ahead of time and for a specific period of time, encouraging consumers to modify their consumption habits by taking price factors into consideration.

Transformers with amorphous core - Alternative transformers that are more energy-efficient and environmentally-friendly than conventional.