M
Data and Resources
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Macroaggregate
From 250 μm to 10 mm or greater in diameter.
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Macroenvironment
The network of systems in which organizations exist; composed of culture,...
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Main stream
Principal current of a flowing course of water (brook, river, etc.).
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Mainstreaming
Taking into consideration as an integral part of the issue in question.
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Mainstreaming gender equity
Mainstreaming gender equity has become a strategic objective of the Food and...
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Manageable water resources
It is the volume of water potentially available for consumptive water-use...
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Managed resource protected area
Protected area managed for the sustainable use of natural ecosystems....
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Mangrove
A tree or shrub that grows in chiefly tropical coastal swamps that are...
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Marginalization
Treatment of a person, group, or concept as insignificant or peripheral.
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Mariculture
The cultivation of marine organisms in their natural environment.
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Marine
By marine is meant coastal and offshore waters in which the salinity is...
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Marine pollution
The introduction by man, directly or indirectly, of substances or energy into...
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Marine protected area (MPA)
A geographically defined marine area that is designated or regulated and...
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Marine sediment
Any deposit of insoluble material, primarily rock and soil particles,...
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Marine spatial planning
Marine spatial planning is a public process of analyzing and allocating the...
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Maritime spatial planning
A crosscutting policy tool enabling public authorities and stakeholders to...
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Maritime zone
Exclusive zone, contiguous zone, fishing zone, territorial sea, internal waters.
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Market-based instrument
Market-based instruments (MBIs) span a range of measures and approaches....
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Market-based/ economic incentives
Market-based approaches or incentives provide continuous inducements,...
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Material flow accounting
The quantification of all materials used in economic activities. It accounts...
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Material input per unit service
The MIPS concept can be used to measure eco-efficiency of a product or...
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Maternal mortality
Term used to capture the deaths caused by or associated with pregnancy,...
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Maternal mortality ratio
The maternal mortality ratio can be calculated by dividing recorded (or...
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Maternity protection
Protection to ensure that expectant and nursing mothers will not lose their...
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Mean species abundance
It expresses the mean abundance of original species in disturbed conditions...
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Medical molecular farming
An experimental application of biotechnology in which plants are genetically...
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Megacities
Urban areas with more than 10 million inhabitants.
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Megajoule
A unit of energy equal to one million joules.
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Melanic horizon
A melanic horizon (from Greek melas, black) is a thick, black horizon at or...
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Mentorship
Refers to a work relationship in which a more experienced or more...
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Merit goods
Goods or services (such as education and vaccination) provided free for the...
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Merkel cell carcinoma
A very rare disease in which malignant (cancer) cells form in the skin....
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Methemoglobinemia
A condition in which a higher-than-normal amount of methemoglobin is found in...
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Microaggregate
Aggregates up to 250 μm in diameter.
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Microbeads
A tiny sphere of plastic (such as polyethylene or polypropylene).
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Microbial and non-microbial contaminants
Microbiological contamination refers to the non-intended or accidental...
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Microecology
The study of microorganisms and their interactions with other organisms and...
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Microhabitat
A habitat which is of small or limited extent and which differs in character...
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Microplastics
Small plastic pieces, less than five millimeters long which can be harmful to...
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Middle east respiratory syndrome (MERS)
A viral respiratory disease caused by a novel coronavirus (Middle East...
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Middle east respiratory syndrome coronavirus (MERS-COV)
A coronavirus causing Middle East respiratory syndrome (MERS).
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Midpoint impact category
Environmental impact category located between the life cycle inventory (human...
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Migratory species
The entire population or any geographically separate part of the population...
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Millennium development goals (MDGS)
The eight Millennium Development Goals – which range from halving extreme...
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Millennium ecosystem assessment
The Millennium Ecosystem Assessment (MA) was called for by the United Nations...
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Minimum inhibitory concentration
The lowest concentration of an antibiotic agent which, when present in a...
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Minimum viable population
Ecological threshold that specifies the smallest number of individuals in a...
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Mitigation
In the context of climate change, a human intervention to reduce the sources,...
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Mitigation (of land degradation)
An intervention intended to reduce ongoing degradation at a stage when...
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Moderately salt-affected area
Salt patches on soil surface 1–10%.
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Modified functional attribute diversity
It reflects the diversity in nutrients provided by the different food items...
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Modified land use
Areas where the land use has been modified.
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Moisture content
The amount of water contained in the seed sample and is expressed as a...
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Moisture retention capacity
Quantity of water retained by soil that can be absorbed by plants, between...
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Molecular epidemiology
A discipline that uses molecular or genetic markers to trace the development...
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Mollic A horizon
The mollic horizon (from L. mollis, soft) is a well structured, dark coloured...
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Monocultural farming systems
The cultivation or growth of a single crop or organism especially on...
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Moor/peatbog
A peatland that receives water and nutrients exclusively from atmospheric...
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Mottling
Mottles are spots or blotches of different colours or shades of colour...
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Muck
Black, completely decomposed organic material.
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Mudflow
Muddy flow composed of water and a very high concentration of sediments and...
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Mudslide
Flow of water so heavily charged with sediment and debris that the flowing...
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Multidisciplinary
Combining or involving several academic disciplines or professional...
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Multilateral environmental agreements (MEAS)
Treaties, conventions, protocols and contracts between several states...
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Municipal by-product
Refers to biomass wastes produced by the urban population and comprises two...
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Municipal solid waste
A mixture of domestic, small-scale industrial and demolition solid wastes...
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Mycotoxin
Mycotoxins are toxic compounds that are naturally produced by certain types...
Additional Info
| Field | Value |
|---|---|
| Source | https://wesr-staging.azurewebsites.net/glossary/ajax/ajax.searchbyindex.php?q=M |
| Author | UNEP GEO |
| Maintainer | UNEP GEO |
| Last Updated | January 26, 2023, 06:32 (UTC) |
| Created | September 13, 2022, 18:26 (UTC) |
| GUID | unep-geo-glossary-letter-m |
| Issued | 2022-08-31 14:54:40 |
| Language | en |
| Modified | 2022-11-09 17:41:18 |
| Publisher name | UNEP GEO |
| Theme | Glossary |
| data_type | webpage |
| spatial | Global |