A testing facility officially recognized to meet specific standards and qualifications for conducting environmental analyses.

A system or device designed to warn of a specific environmental hazard or condition.

Fuels considered to be environmentally friendlier than conventional fuels, such as biodiesel or hydrogen.

A process of merging or combining materials, often used in reference to the treatment of certain wastes or recovery of precious metals.

Official permission or approval to undertake a specific action or process, often related to environmental regulations.