Biodiversity refers to the variety of life forms on Earth, encompassing the different species, ecosystems, and genetic variations that exist.

Environmental remediation is the cleanup of hazardous substances dealing with the removal, treatment and containment of pollution or contaminants from environmental media such as soil, groundwater, sediment.

Flood control refers to measures taken to prevent or mitigate the damaging effects of flooding.

Hydraulics is a branch of science and engineering that deals with the mechanical properties of liquids.

Irrigation is the artificial application of water to agricultural fields, gardens, lawns, and other landscapes to help crops and plants grow.

A microorganism is a living organism that is too small to be seen by the naked eye.

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