Definitions - e

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

Crops grown specifically for their fuel value. These include food crops such as corn and sugarcane and nonfood crops such as poplar trees and switch-grass.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

Where installing energy-efficient appliances leads to an increase in energy use; because being energy-efficient makes energy cheaper, or makes consumers feel less guilty about using energy.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

Plants that emerge and bloom during one season, then die back for the remainder of the year. Many spring ephemerals bloom in woodlands, including trillium and ladyslipper.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.

To spend the summer in a sleeplike condition of partial or total inactivity.

A cell producing an electric current direct from a chemical reaction.

Shallow, murky bodies of water that have excessive concentrations of plant nutrients causing excessive algal production.

Enrichment of water, which causes excessive growth of aquatic plants and increasing activity of anaerobic microrganisms. As a result the oxygen levels in the water quickly decline and the water chokes, making life impossible for aerobic water organisms.

An evacuated tube is most often encountered in solar hot water heating systems. This is where a glass tube is used, with a good heat conductor placed in the middle of it. All the air is removed from the tube, so that when the Sun light hits the heat conductor no heat is then lost out to the tube itself. This way the maximum amount of heat is caught and sent up the heat conductor to then heat the water passing over at the top of the tube.

The other advantage with this approach is that the tube will be placed to be always inline with the Sun as it move through the sky, i.e. no matter where the Sun is the central conductor will present the same surface area to heat.

Often these heating systems are so efficient, that over temperature valves and safety guards need to be put into the installed system.

The loss of water from a land area through evaporation from the soil and through plant transpiration.

Plants whose leaf cover remains alive year-round, though individual leaves may die and fall. Includes species, such as Rhododendron, whose leaves go dormant and change color at the end of the growing season, then green up again for the new season. Other evergreens, such as Pinus banksiana (Jack Pine), discard batches of leaves periodically. Evergreens may have needles (pine and spruce, for instance) or "broad" leaves (holly and rhododendron). Perennial plants whose leaves all die at once (and usually fall) at the end of each growing season (i.e. maple trees) are deciduous.

A plant whose needles or leaves remain green throughout the year and do not drop.

This is the process by which low-lying clouds are produced from water evaporation off plants, which take their water from the soil. The clouds so produced can help reflect the sun's rays, causing atmospheric cooling..

Materials used to generate heat in chemical or other processes.

An introduced species, plant or animal that is not native to a geographic area or ecosystem.

A cell producing an electric current direct from a chemical reaction.

A cost or benefit not accounted for in the price of goods or services. Often "externality" refers to the cost of pollution and other environmental impacts.

A cell producing an electric current direct from a chemical reaction.

A cell producing an electric current direct from a chemical reaction.