Glossary M

The Environmental Glossary. Letter M +++ 'Metric', 'Matter', 'Management'
A macroinvertebrate is organisms that lack a backbone and can be seen with the naked eye.

Macroinvertebrates are animals without backbones of a size large enough to be seen by the unaided eye and which can be retained by a U.S. Standard No. 30 sieve (28 meshes per inch, 0.

In the environmental context, "maintenance" refers to the activities and practices carried out to ensure the proper functioning, longevity, and sustainability of environmental assets, systems, and infrastructure. Maintenance plays a crucial role in preserving and enhancing the quality of the environment, promoting resource efficiency, and preventing environmental degradation.

A Major Non-Conformity is an indication or judgment that a process, product, or service has not met all the requirements and will likely impact the user's ability to use the product.

Major sources are defined by the Clean Air Act as those stationary facilities that emit or have the potential to emit 10 tons of any one toxic Air Pollutant or 25 tons of more than

A MAKE-UP AIR is See "Outdoor Air Supply.

Malnutrition is the faulty nutrition, caused by a diet that does not supply an individual with enough protein, essential fats, vitamins, minerals, and other nutrients needed for good

A Malthusian is based on the theories of British economist Thomas Robert Malthus (1766-1834), who argued that population tends to increase faster than food supply, with inevitably disastrous results, unless the increase in population is checked by moral restraints or by war, famine, and disease.

Mammals (class Mammalia) are a clade of endotherms that are distinguishable from reptiles and birds by the possession of the mammalian auditory ossicles, mammary glands, and a neocortex.

In the environmental context, "management" refers to the planning, organizing, and directing of activities related to the use, protection, and restoration of natural resources and ecosystems.

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