Definitions - m

Magma

Cap and Trade is a market-based policy tool for protecting human health and the environment.

A cap and trade program first sets an aggressive cap, or maximum limit, on emissions. Sources covered by the program then receive authorizations to emit in the form of emissions allowances, with the total amount of allowances limited by the cap. Each source can design its own compliance strategy to meet the overall reduction requirement, including sale or purchase of allowances, installation of pollution controls, implementation of efficiency measures, among other options. Individual control requirements are not specified under a cap and trade program, but each emissions source must surrender allowances equal to its actual emissions in order to comply. Sources must also completely and accurately measure and report all emissions in a timely manner to guarantee that the overall cap is achieved.

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Magnetosphere

The region around the earth in which the earth's magnetic field plays a dominant part in controlling the physical processes that take place.

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Mammatus Clouds

Clouds that look like pouches hanging from the underside of a cloud.

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Mandatory Recycling

Programs which by law require consumers to separate trash so that some or all recyclable materials are recovered for recycling rather than going to landfills.

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Mantle

The part of the earth between the crust and the core.

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Mauna Loa

A volcano on the island of Hawaii where scientists have maintained the longest continuous collection of reliable daily atmospheric records.

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Mean Radiant Temperature

The average temperature experienced from the combination of all the surface temperatures in a room, i.e walls, floors, ceilings, furniture, and people.

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Mesoscale

The scale of meteorological phenomena that ranges in size from a few km to about 100 km. It includes local winds, thunderstorms, and tornadoes.

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Meteorologist

A scientist who studies the weather.

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Meteorology

The science of weather related phenomena.

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Methane

Cap and Trade is a market-based policy tool for protecting human health and the environment.

A cap and trade program first sets an aggressive cap, or maximum limit, on emissions. Sources covered by the program then receive authorizations to emit in the form of emissions allowances, with the total amount of allowances limited by the cap. Each source can design its own compliance strategy to meet the overall reduction requirement, including sale or purchase of allowances, installation of pollution controls, implementation of efficiency measures, among other options. Individual control requirements are not specified under a cap and trade program, but each emissions source must surrender allowances equal to its actual emissions in order to comply. Sources must also completely and accurately measure and report all emissions in a timely manner to guarantee that the overall cap is achieved.

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Methyl Bromide

An effective pesticide; used to fumigate soil and many agricultural products. Because it contains bromine, it depletes stratospheric ozone when released to the atmosphere.

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Metropolitan Coalescence

The merging of the urbanized areas of separate metropolitan regions; Megalopolis is an example of this process.

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Micro Inverter

This is a small Inverter that mounts on to the back of each solar panel instead of having one large Inverter used by all the panels. While it works better when partial shading is a concern, it can increase the cost of the overall system.

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Micro Wind Turbine

Micro wind turbine is an umbrella term for small scale wind turbines that are typically deployed on or near buildings and used to generate electricity that is transmitted direct to the property.

Micro wind turbines have in the past been criticized for being visually intrusive and generating less energy than expected.

However, suppliers maintain that models can generate up to 100Kw of energy and represent an efficient source of on-site renewable energy as long as they are situated correctly.

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Microburst

A strong localized downdraft less than 4 km wide that occurs beneath severe thunderstorms. A strong downdraft greater than 4 km across is called a down burst.

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Microgrid

Clean Energy is energy which is produced without a negative impact on the environment. Essentially it is neutral in its production of pollution and its consumption of resources.

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Midnight Zone

The area of the ocean beneath the twilight zone, extending from 3,000 feet (1,000 m) down to the ocean floor, where only about 1 percent of marine life can survive.

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Mitigation

Steps taken to avoid or minimize negative environmental impacts. Mitigation can include: avoiding the impact by not taking a certain action; minimizing impacts by limiting the degree or magnitude of the action; rectifying the impact by repairing or restoring the affected environment; reducing the impact by protective steps required with the action; and compensating for the impact by replacing or providing substitute resources.

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Modal

Modal is 100% biodegradable and can make a great eco alternative to viscose. It's made from beech trees in Australia and needs few fertilizers or pesticides.

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Monoculture

The cultivation of a single species crop.

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Mould

The supply and introduction of adequate air for ventilation and control of airborne contaminants, acceptable temperatures and relative humidity.

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Mutagenicity

A change in the genetic material of a living organism, usually in a single gene, which can be passed on to future generations.

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