Definitions - m


Climate change is a change in the statistical distribution of weather over periods of time that range from decades to millions of years. It can be a change in the average weather or a change in the distribution of weather events around an average (for example, greater or fewer extreme weather events). Climate change may be limited to a specific region, or may occur across the whole Earth.

In recent usage, especially in the context of environmental policy, climate change usually refers to changes in modern climate. It may be qualified as anthropogenic climate change, more generally known as global warming.

Wikipedia - Climate Change entry

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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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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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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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A scientist who studies the weather.

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The science of weather related phenomena.

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A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.

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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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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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A microgrid is a group of interconnected loads and distributed energy resources within clearly defined electrical boundaries that to the grid act as a single controllable entity. A microgrid can connect and disconnect from the grid to allow it to operate in both grid-connected or island-mode.

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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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A hydrocarbon deposit, such as petroleum, coal, or natural gas, derived from living matter of a previous geologic time and used for fuel.

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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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The cultivation of a single species crop.

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Energy Efficiency is when you use less energy to accomplish the same task, for example heating your home or washing clothes. Using less energy by being more efficient means less air pollution and lower costs.

To save energy in your home, you can use weather stripping, solar water heating, passive solar or compact fluorescent light bulbs. Also when shopping for household appliances, look for the Energy Star to find appliances that use less energy and lower your electricity costs.

You can also reduce your heating and cooling costs by installing better insulation.

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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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