Agreement in which a certain amount of foreign debt is canceled in exchange for local currency investments that will improve natural resource management or protect certain areas in the debtor country from harmful development.Search the Web for Debt-for-nature Swap
Removing all the trees from a given area; a destruction of entire forests at a time.Search the Web for Deciduous
A Decomposer is an an organism whose ecological function involves the recycling of nutrients by performing the natural process of decomposition as it feeds on decaying organisms.
A Deep Cycle Battery is a battery that is capable of been discharged to nearly completely empty without long term negative effects on the life of the battery and its storage capacity.
Someone who believes we need a radical transformation to a more sustainable society. Also, the belief environmental sustainability should have primacy over economic and social factors. Contrasts with light green and bright green.Search the Web for Deep Green
Ability of materials to break down, by bacterial (biodegradable) or ultraviolet (photodegradable) action.Search the Web for Degradability
Mechanisms to manage the demand from customers in response to supply conditions.Search the Web for Demand Response
Removal of nitrate and nitrate product from water to produce a quality that answeres common water standards.Search the Web for Denitrification
The tendency of a population's growth rate to depend on its size, with an increase in population density corresponding to a decrease in growth. This self-regulating dynamic helps prevent extinction.Search the Web for Density Dependence
Carbon is the chemical element with symbol C and atomic
number 6. As a member of group 14 on the periodic table, it is nonmetallic
and tetravalent—making four electrons available to
form covalent chemical
bonds. There are three naturally occurring isotopes, with 12C
being stable, while 14C is radioactive, decaying with a half-life
of about 5730 years.
Carbon is one of the few
elements known since antiquity.
The name "carbon" comes from Latin language carbo, coal.
See the full entry on wikipedia
Conversion of rangeland, rain-fed cropland to desert-like land, with a drop in agricultural productivity of 10% or more. This is usually caused by a combination of overgrazing, soil erosion, prolonged drought, and climate change.Search the Web for Desertification
Animals and plants that consume detritus (decomposing organic material), and in doing so contribute to decomposition and the recycling of nutrients.Search the Web for Detritivore
The dew point is the temperature to which a given parcel of humid air must be cooled, at constant barometric pressure, for water vapor to condense into water. The condensed water is called dew. The dew point is a saturation temperature.The dew point is associated with relative humidity. A high relative humidity indicates that the dew point is closer to the current air temperature. Relative humidity of 100% indicates the dew point is equal to the current temperature and the air is maximally saturated with water. When the dew point remains constant and temperature increases, relative humidity will decrease. Search the Web for Dew Point
A pesticide used on citrus fruits.Search the Web for Dicofol
A condition in trees or woody plants in which peripheral parts are killed, either by parasites or due to conditions such as acid rain.Search the Web for Dieback
Long-lasting highly toxic hydrocarbons; byproducts of various industrial processes, including paper and pesticide manufacturing and waste incineration. Dioxins are the most potent carcinogens known to science and also may affect human development and reproduction.Search the Web for Dioxins
Sunlight falling directly upon a collector. Opposite of diffuse insolation.Search the Web for Direct Insolation
Water that flows from the ground surface directly into streams, rivers, and lakes.Search the Web for Direct Run-off
Dispatchability is the ability of a power plant to be turned on quickly to a desired level of output. Wind power plants are not dispatchable.Search the Web for Dispatchability
A Dispersion Trench is a method by which effluent after processing is distributed back into the environment in a way which reduces environmental impact. They often positioned so that the effluent is distributed by a grid of trench pipes into the soil directly; the aim being that the effluent never gets to the surface.
DERs. A variety of small, modular power-generating technologies that can be combined with energy management and storage systems and used to improve the operation of the electricity delivery system, whether or not those technologies are connected to an electricity grid.Search the Web for Distributed Energy Resources
The difference between maximum and minimum temperature over a period of 24 hours.Search the Web for Diurnal Temperature Range
A unit used to measure the abundance of ozone in the atmosphere; one Dobson unit is the equivalent of 2.69 x 1016 molecules of ozone/cm2.Search the Web for Dobson Unit
A traditional window style with two glass-holding frames that slide past each other vertically.Search the Web for Double-hung Windows
Downcycling is the recycling of a material into a material of lesser quality. For example, when plastics are recycled they are turned into a lower grade quality plastic.Search the Web for Downcycling
The process of accumulation and sinking of warm surface waters along a coastline. A change of air flow of the atmosphere can result in the sinking or downwelling of warm surface water. The resulting reduced nutrient supply near the surface affects the ocean productivity and meteorological conditions of the coastal regions in the downwelling area.Search the Web for Downwelling
This is the total surface area, upstream of a point on a stream, where the water from rain, snowmelt, or irrigation not absorbed into the ground flows over the ground surface, back into streams, to finally reach that point.Search the Web for Drainage Area
The practice of spraying water directly on the base of plants so that less water is needed to make them grow.Search the Web for Drip Irrigation
Emissions of sulphur and nitrogen oxides that, in the absence of water in the atmosphere (i.e., rain), settle to the ground as particulate matter.Search the Web for Dry Deposition
A type of farming practiced in semi-arid or dry grassland areas without irrigation using such approaches as fallowing, maintaining a finely broken surface, and growing drought-tolerant crops.Search the Web for Dry Farming
A crumbling and drying of wood that is caused by a fungus; turns wood into powder.Search the Web for Dry Rot
(water management) Accumulation of salts in soils, soil water and ground water; may be natural or induced by land clearingSearch the Web for Dryland Salinity
Dryland systems are ecosystems characterised by a lack of water. They include cultivated lands, scrublands, shrublands, grasslands, savannas, semi-deserts and true deserts.Search the Web for Dryland Systems
A device to which wind generator power flows when the system batteries are too full to accept more power, usually an electric heating element. This diversion is performed by a Shunt Regulator, and allows a Load to be kept on the Alternator or Generator.Search the Web for Dump Load
Acidic bodies of water that contain many plants but few fish, due to the presence of great amounts of organic matter.Search the Web for Dystrophic Lakes