Glossary I

The Environmental Glossary. Letter I +++ 'I-V curve', 'Inorganic', 'Impairment'
An Immunity is the power an animal has to resist and/or overcome an infection to which most of its species are susceptible. Active Immunity is due to the presence of antibodies
An Immunoglobulin is a class of proteins produced in lymph tissue in vertebrates that function as antibodies in the immune
An Impact is change in the chemical, physical (including habitat) or biological quality or condition of a waterbody caused by external sources.
An Impairment is detrimental effect on the Biological Integrity of a waterbody caused by an Impact that prevents attainment of the designated use.
An Impermeable layer is a Layer of solid material, such as rock or clay, which does not allow water to pass through.
An Impervious Surface is a hard surface area that either prevents or retards the entry of water into the sail mantle or causes water to run off the surface in greater quantities or at
An implementation field program is the decision by EMAP to make a long-term commitment to provide scientifically defensible estimates of current status, trends, and changes in condition indicators and association of these indicators with selected stressors.

The Implementation Phase is an onset of actions necessary to turn planned activities into actions started so that the project"s goals or deliverables can be achieved.

The term "impoundment" may refer to any one of the following:

The In a Million Cancer Risk is a risk level of 1 in a million implies a likelihood that up to one person, out of one million equally exposed people would contract cancer if exposed continuously (24 hours per day) to the specific Concentration over 70 years (an assumed lifetime).