Energy conservation

annual environmental event

reducing energy consumption

ratio between the useful energy output and the input of a machine

minimizing the amount of energy used for a given, constant energy service

economical theory that increased efficiency in use of a resource also tends to increase consumption of that resource

system for distributing heat generated in a centralized location for residential and commercial heating requirements

process by which waste paper is turned into new paper products

The RETScreen Clean Energy Management Software (usually shortened to RETScreen Expert) is a software package developed by the Government of Canada. RETScreen Expert was highlighted at the 2016 Clean Energy Ministerial held in San Francisco. The Government of Canada's Treasury Board Secretariat uses RETScreen Expert as its greenhouse gas reporting tool for all federal departments and agencies required to report emissions.

thumb|right|A thatched public house|pub (The Williams Arms) at [[Wrafton, North Devon, England]] Thatching is the craft of building a roof with dry vegetation such as straw, water reed, sedge (Cladium mariscus), rushes, heather, or palm branches, layering the vegetation so as to shed water away from the inner roof. Since the bulk of the vegetation stays dry and is densely packed—trapping air—thatching also functions as insulation. It is a very old roofing method and has been used in both tropical and temperate climates. Thatch is still employed by builders in developing countries, usually with

process of recovering scrap or waste plastic for reprocessing

aircraft powered by electric motors as opposed to internal combustion engines

agricultural method which does not disturb soil through tillage

construction element consisting of at least two glass plates for windows and other glazing

suspend mode for electronic devices which maintains state in volatile memory

protection of buildings against heat transfers

inspection, survey and analysis of energy flows for energy conservation in a building, process or system to reduce the amount of energy input into the system

measure of heating or cooling used in agriculture

block of electrical sockets

computer suspend mode that dumps main memory to persistent storage and fully powers down

achieved with greatly differing technologies that collectively accommodate a wide range of needs; allows excess thermal energy to be collected for later use

any type of house that uses less energy than a traditional or average contemporary house

thumb|right|Construction block made from hempcrete thumb|Illustration of hemp concrete carbon emission and sequestration, with a net emissions balance indicating carbon negativity

overview about computer recycling

voluntary certification program intended to promote efficient energy use in computer power supply units

type of service company

driving techniques aimed at reducing fuel consumption

any cooling method that facilitates heat dissipation without additional energy input

power-saving option for Ethernet network devices

political model envisaging the average First World citizen reducing their average energy usage to no more than 2000 watts by 2050

form of recycling

economy made up of constant physical wealth and population size

heat pump that uses air as the heat source / sink

recycling of bottles made of polyethylene terephthalate

building surrounded by earth

Blackle is an internet search engine powered by Google Programmable Search Engine. It was created by Toby Heap of Heap Media Australia with the goal of saving energy by displaying a black background with grayish-white text color on search results. As of July 2023, Blackle claims to have saved over 10.07 MWh of electrical energy.

power management technique in computer architecture, where the voltage used in a component is increased or decreased, depending upon circumstances

technique in computer architecture whereby the frequency of a microprocessor can be automatically adjusted "on the fly", either to conserve power or to reduce the amount of generated heat

the consumption of energy by electronic and electrical appliances while they are switched off or in standby mode

a theoretical unit of power representing the amount of electrical power in watts saved

ventilation system that recovers energy by operating between two air sources at different temperatures

thumb|400px|Types of recuperator, or cross plate heat exchanger A recuperator is a counter-flow energy recovery heat exchanger that recovers waste heat in the supply and exhaust air streams of an air-handling system or in the exhaust gases of an industrial process. Generally, they extract heat from the exhaust and use it to preheat air entering the combustion system, reducing the need for fuel and boosting the system's energy efficiency.

storage of heat or cold for periods of up to several months

building material that expands and cures to form a polyurethane foam

a feature of some electrical appliances

indicator: ratio that describes how efficiently a computer data center uses energy; specifically, how much energy is used by the computing equipment (in contrast to cooling and other overhead)

increase in consumption following energy or resource savings

type of figure of merit describing computer energy efficiency

process to to improve fuel economy, power output, or emissions

open hardware plastic recycling project

Planning and operation of energy production and energy consumption units

certification mark

thumb|300px|The passivhaus standard combines superinsulation with other techniques and technologies to achieve ultra-low energy use. Superinsulation is an approach to building design, construction, and retrofitting that dramatically reduces heat loss (and gain) by using much higher insulation levels and airtightness than average. Superinsulation is one of the ancestors of the passive house approach.

flying sun-powered vehicles

utilisation of the thermal energy contained in the wastewater

replication of aspects of building performance

application of renewable energy

public bench for waiting for a spontaneous, free ride in a car