Glossary

E-Waste

**E-waste**, or electronic waste, refers to discarded electrical and electronic equipment that has reached the end of its useful life or is no longer wanted. It includes items such as computers, mobile phones, televisions, printers, household appliances, batteries, cables, and other digital devices. E-waste often contains hazardous substances like lead, mercury, cadmium, and flame retardants, which can harm human health and the environment if not managed properly. At the same time, it...

Earth System Models (ESMs)

**Earth System Models (ESMs)** are complex computational tools that simulate the interactions and processes occurring within the Earth's atmosphere, hydrosphere, biosphere, and geosphere. These models integrate data from various scientific disciplines, including meteorology, oceanography, biology, and geology, to provide a holistic understanding of how Earth's systems interact and respond to natural and anthropogenic changes. ESMs are pivotal in forecasting climate change impacts,...

Eco-design

**Eco-design** is a systematic approach to developing products, services, and systems that minimizes negative environmental impacts throughout their entire life cycle — from raw material extraction and manufacturing to use, maintenance, and end-of-life management. It integrates environmental considerations into every design decision, aiming to reduce resource consumption, energy use, pollution, and waste while maintaining or improving performance, quality, and user value. Eco-design promotes...

Eco-efficiency

**Eco-efficiency** is a strategic approach that aims to create more value with less environmental impact. It encapsulates the principle of doing more with less by maximizing the efficiency of resource use while minimizing waste and environmental footprint. By integrating economic and environmental performance, businesses can achieve sustainable growth and increase their competitiveness. At its core, eco-efficiency encourages organizations to develop innovative solutions that deliver greater...

Eco-modulation

**Eco-modulation** is a policy mechanism within Extended Producer Responsibility (EPR) schemes that adjusts producer fees based on the environmental performance of products. Producers pay lower fees for eco-designed, recyclable, or less polluting products, and higher fees for those with greater environmental impact. This incentivizes sustainable design, reduces waste, and supports the transition to a circular economy.

Ecolabel

An **ecolabel** is a certification mark or environmental label used to identify products or services that meet defined sustainability criteria. Most credible ecolabels are based on life-cycle considerations, evaluate multiple environmental impacts, and require independent verification. Examples include the EU Ecolabel, Nordic Swan, and Blue Angel. Ecolabels help consumers and procurement teams identify environmentally preferable products while reducing the risk of misleading environmental...

Ecological Footprint

The **Ecological Footprint** is a metric used to quantify the demand placed on Earth's ecosystems by human activities. It represents the amount of biologically productive land and water area required to produce the resources that an individual, population, or activity consumes, and to absorb the waste they generate, given prevailing technology and resource management practices. Essentially, it is a measure of the environmental impact of human consumption. This footprint can be expressed in...

Ecosystem Services

**Ecosystem services** are the benefits that humans derive from natural ecosystems. These include provisioning services like food, water, and raw materials; regulating services such as climate regulation, flood control, and disease prevention; cultural services that provide recreational, aesthetic, and spiritual benefits; and supporting services like soil formation, photosynthesis, and nutrient cycling. Protecting and enhancing ecosystem services is essential for human well-being, economic...

Ecosystem-Based Adaptation (EbA)

**Ecosystem-Based Adaptation (EbA)** refers to the strategic use of biodiversity and ecosystem services to help communities adapt to the adverse effects of climate change. EbA integrates the sustainable management, conservation, and restoration of ecosystems to provide services that increase the resilience of people against climate impacts. This approach underscores the critical role of natural infrastructure, such as forests, wetlands, and coral reefs, in mitigating the effects of extreme...

Eddy Covariance Flux Measurement

**Eddy Covariance Flux Measurement** is a critical scientific technique used to quantify the exchange of gases, such as carbon dioxide, water vapor, and methane, between the earth's surface and the atmosphere. This method involves measuring the vertical turbulent fluxes within atmospheric eddies, which are small, chaotic wind patterns that transport gases and energy. By capturing high-frequency data on wind speed and gas concentration, the Eddy Covariance system provides insights into...

Electric Vehicles (EVs)

**Electric Vehicles (EVs)** are automobiles that are powered by electric motors rather than conventional internal combustion engines. These motors are driven by electrical energy stored in batteries or other energy storage devices, which are typically recharged through an external power source or regenerative braking systems. As a result, EVs produce zero tailpipe emissions, significantly reducing their environmental impact and contributing to cleaner air and fewer greenhouse gases. There...

Electrochemical Reduction of CO2

**Electrochemical Reduction of CO2** is a cutting-edge process aimed at converting carbon dioxide (CO2) into valuable products through electrochemical reactions. Utilizing renewable electricity, this approach reduces CO2 emissions by transforming them into substances such as carbon monoxide, formic acid, methane, and ethylene, which can serve as raw materials for various industries. This technique not only addresses greenhouse gas reduction but also contributes to the circular economy by...

Electrolysis of Water

**Electrolysis of Water** is a fundamental chemical process that involves splitting water (H₂O) into its constituent elements, hydrogen (H₂) and oxygen (O₂), using an electric current. This sustainable technique leverages renewable energy sources, such as solar or wind power, to generate the necessary electricity, making it a pivotal component in the green economy. By facilitating the production of clean hydrogen fuel, the electrolysis of water plays a crucial role in reducing reliance on...

Emission Factor

An **Emission Factor** is a quantifiable measure that represents the rate at which a particular pollutant is released into the atmosphere as a result of a specific activity or process. This metric is essential for calculating and understanding the environmental impact of various industrial, agricultural, and everyday human activities. Generally expressed as the mass of pollutant emitted per unit of activity (e.g., kilograms of CO2 per megajoule of energy produced), emission factors enable...

Emission Intensity

**Emission Intensity** refers to the amount of greenhouse gas emissions produced per unit of economic activity or output. It is typically expressed in terms of CO₂ emissions per unit of Gross Domestic Product (GDP) or per kilowatt-hour of energy produced. This metric serves as a valuable indicator for understanding the environmental impact of different industrial sectors, regions, or countries, and helps in benchmarking progress in reducing overall carbon footprints. Reducing **Emission...

Emission Reduction

**Emission Reduction** refers to the deliberate actions taken to decrease the amount of pollutants released into the atmosphere, primarily those related to greenhouse gases such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). These emissions are produced from various sources, including industrial activities, transportation, agriculture, and energy production. Reducing emissions is a critical component in combating climate change and achieving sustainability goals. By...

Emissions Intensity

Emissions intensity measures how much pollution (like carbon dioxide) is produced for each unit of output, such as a product made or energy generated. Unlike total emissions which simply counts all pollution released, intensity shows how clean or dirty the production process is by comparing pollution to output level. For example, a cement plant might emit 800kg of CO2 for each ton of cement produced - this ratio is its emissions intensity. This measurement helps compare environmental...

Emissions Performance Credits (EPCc)

**Emissions Performance Credits (EPCs)** are tradable credits earned when a product, facility, or project performs better than a defined emissions benchmark. If emissions are lower than the set standard, the surplus reduction can generate EPCs, which may be used to meet regulatory requirements or traded with others. EPCs are commonly discussed in low-carbon procurement and building policies to reward cleaner materials or processes. They differ from offsets because they’re tied to performance...

Emissions Trading

**Emissions Trading** is an innovative market-based approach aimed at controlling and reducing greenhouse gas emissions. It enables countries or businesses to buy and sell emission allowances, providing economic incentives for achieving environmental targets efficiently. By setting a cap on the total amount of permissible emissions, this system creates a marketplace where companies that manage to reduce their emissions below the set limits can sell their surplus allowances to those that...

Energy Conservation

**Energy Conservation** is the practice of reducing energy consumption through various means to preserve resources for future generations and lessen environmental impact. By implementing energy-saving measures, we can mitigate the effects of climate change, reduce our carbon footprint, and contribute to a more sustainable and resilient planet. Energy conservation can be achieved through a combination of technical solutions and behavioral changes. Utilizing energy-efficient appliances,...

Energy Demand Management

**Energy Demand Management** is a strategic approach aimed at optimizing the use of energy resources by influencing consumer demand. This method involves the implementation of various practices, policies, and technologies designed to encourage more efficient energy use during peak and off-peak times. By adjusting consumption patterns, Energy Demand Management not only helps to balance the grid, reducing the risk of outages, but also promotes sustainability by enhancing energy efficiency and...

Energy Efficiency

**Energy efficiency** refers to using less energy to perform the same task or produce the same outcome. It is achieved by incorporating technologies and practices that reduce energy waste, such as LED lighting, energy-efficient appliances, and improved insulation. Enhancing energy efficiency is one of the most cost-effective ways to reduce greenhouse gas emissions, lower energy costs, and improve energy security.

Energy Performance Contracting (EPC)

**Energy Performance Contracting (EPC)** is an innovative financing mechanism designed to enhance the energy efficiency of buildings and facilities without the need for large upfront capital. Under an EPC agreement, an Energy Service Company (ESCO) conducts comprehensive energy audits to identify potential improvements. The ESCO then implements these energy-saving measures, promising to achieve a specified level of energy savings over a set period. With EPC, the costs of the energy-efficient...

Energy Resilience

**Energy resilience** refers to the capacity of an energy system to continue operating during outages or disruptions. Key term when evaluating backup power solutions and off-grid capabilities.

Energy Return on Investment (EROI)

**Energy Return on Investment (EROI)** is a crucial metric used to evaluate the efficiency and sustainability of various energy production methods. It measures the ratio of the amount of usable energy obtained from a particular energy resource to the amount of energy expended to obtain that resource. Essentially, EROI answers the question: "How much energy do we get out for each unit of energy we put in?" A high EROI indicates that a significant amount of energy is produced relative to the...

ENERGY STAR

**ENERGY STAR** is a U.S. government-backed program launched in 1992 by the Environmental Protection Agency (EPA) to promote energy efficiency. It certifies products, buildings, and appliances that meet strict energy performance standards, helping reduce greenhouse gas emissions and save consumers money. The ENERGY STAR label identifies high-efficiency equipment and sustainable building designs, encouraging businesses and individuals to adopt cleaner, cost-effective energy solutions that...

Energy Storage Systems (ESS)

**Energy Storage Systems (ESS)** are advanced technologies designed to store and manage energy, ensuring its availability when needed. By capturing energy produced at one time for use at a later time, ESS play a crucial role in stabilizing the grid, integrating renewable energy sources, and enhancing overall energy efficiency. These systems employ various technologies, including batteries, flywheels, compressed air, and thermal storage, each suited for different applications and scales. The...

Energy Supply

**Energy supply** refers to the production, conversion, storage, transmission, distribution and delivery of energy in forms usable by end users, including electricity, heat, fuels and energy carriers such as hydrogen. It encompasses the entire energy value chain, from primary energy sources (renewable and non-renewable) through infrastructure and markets to final consumption. Energy supply includes activities such as power generation, fuel extraction and processing, renewable energy...

Energy System Decarbonization

**Energy System Decarbonization** refers to the comprehensive process of reducing carbon dioxide (CO₂) and other greenhouse gas emissions from energy systems. This endeavor aims to transition from fossil fuel dependency to sustainable and renewable energy sources, such as wind, solar, hydroelectric, and geothermal power. The ultimate goal is to achieve a cleaner, more resilient energy infrastructure that minimizes environmental impact and combats climate change. Achieving energy system...

Energy System Modeling

**Energy System Modeling** is a scientific approach used to understand, analyze, and optimize energy systems. This multidisciplinary field integrates various domains including engineering, economics, and environmental science to simulate how different technologies, policies, and market dynamics influence the production, distribution, and consumption of energy. Through sophisticated mathematical models and computational tools, energy system modeling helps stakeholders forecast energy demands,...

Energy Transition

**Energy Transition** refers to the global shift from traditional, carbon-intensive sources of energy, such as coal, oil, and natural gas, to more sustainable, low-carbon, and renewable energy sources like wind, solar, and hydropower. This transition aims to mitigate climate change, reduce greenhouse gas emissions, and promote environmental sustainability by transforming the ways we produce, distribute, and consume energy. The process of Energy Transition is multifaceted, involving...

Energy Transition Pathways

**Energy Transition Pathways** refer to the strategic routes and structured frameworks through which economies and societies shift from a reliance on fossil fuels to more sustainable, renewable sources of energy. These pathways encompass a variety of approaches, including technological innovation, policy reforms, and consumer behavior changes, all aimed at reducing greenhouse gas emissions and promoting environmental sustainability. The transition involves not only replacing old forms of...

Energy Transition Scenarios

**Energy Transition Scenarios** refer to the various strategic pathways and models that outline how nations and regions can shift from traditional, carbon-intensive energy sources to cleaner, renewable energy systems. These scenarios are crucial for policymakers, businesses, and communities as they navigate the complexities of phasing out fossil fuels while ensuring energy security, economic stability, and environmental sustainability. Typically, Energy Transition Scenarios encompass a...

Enhanced Weathering

**Enhanced Weathering** is an innovative and eco-friendly approach to capturing atmospheric carbon dioxide (CO₂) and mitigating climate change. This natural process involves deliberately accelerating the chemical weathering of certain minerals, such as olivine or basalt, which absorb CO₂ from the air and convert it into stable carbonate minerals. By spreading finely ground rock material over large land areas or incorporating it into agricultural soils, enhanced weathering enhances the natural...

Environmental Attribute Certificate (EAC)

An Environmental Attribute Certificate (EAC) is a tradable instrument that represents the positive environmental benefits of a product or process, separate from its physical attributes. For example, an EAC can verify that one megawatt-hour of electricity was generated from renewable sources or that a ton of cement was produced with lower carbon emissions. This system allows buyers to financially support and claim the environmental benefits of sustainable production, even if they cannot...

Environmental Compliance

**Environmental Compliance** refers to the adherence to environmental laws, regulations, standards, and other requirements such as site permits to operate. This comprehensive set of guidelines is designed to protect the environment and ensure the sustainable management of natural resources. In essence, it encompasses everything an organization needs to do to ensure its operations do not negatively impact the surrounding environment. Organizations are required to stay updated with evolving...

Environmental Footprint Analysis

**Environmental Footprint Analysis** is a comprehensive process used to evaluate the environmental impact of an individual, organization, product, or service. This multifaceted assessment considers various factors such as carbon emissions, water usage, energy consumption, waste production, and the depletion of natural resources throughout the lifecycle of the subject under study. By analyzing these elements, Environmental Footprint Analysis aims to pinpoint areas of significant environmental...

Environmental Impact Assessment (EIA)

An **Environmental Impact Assessment (EIA)** is a process used to evaluate the potential environmental effects of a proposed project or development. It involves identifying, predicting, and assessing the impacts on the environment, including impacts on air, water, soil, biodiversity, and human health. The goal is to ensure that decision-makers consider environmental consequences before proceeding with a project. The EIA process typically includes public participation, where stakeholders can...

Environmental Improvement Plan (EIP)

**Environmental Improvement Plan (EIP)** is a strategic framework established by the UK government to set out long-term actions and legally binding targets for enhancing the natural environment. It defines how the government, regulators, and other stakeholders will protect and restore air, water, soil, and biodiversity while supporting climate resilience and sustainable resource use. The first EIP was published in 2018 as part of the UK’s 25-Year Environment Plan, and under the Environment...

Environmental Performance Index (EPI)

The **Environmental Performance Index (EPI)** is a comprehensive metric designed to gauge the environmental health and sustainability practices of nations across the globe. Developed by Yale University and Columbia University in collaboration with the World Economic Forum, the EPI evaluates countries on a range of environmental indicators. These indicators encompass critical issues such as air and water quality, biodiversity and habitat protection, climate policies, and the management of...

Environmental Product Declaration (EPD)

An **Environmental Product Declaration (EPD)** is like a nutrition label, but for a product's environmental impact. It is a verified, standardized report that reveals the "ingredients" of a product's ecological footprint. Based on scientific Life Cycle Assessment, it quantifies impacts like global warming potential, water use, and resource depletion from raw material extraction to disposal. Created by manufacturers, it provides transparent, comparable data. This allows architects, builders,...

Environmental Ship Index (ESI)

The **Environmental Ship Index (ESI)** is a voluntary port industry scheme that scores ships based on their environmental performance. Developed by the International Association of Ports and Harbors (IAPH) in 2011, it evaluates emissions such as nitrogen oxides (NOx), sulphur oxides (SOx), and greenhouse gases to identify vessels that outperform International Maritime Organization (IMO) standards. Participating ports use ESI scores to offer incentives—typically reduced port dues—to ships...

Environmental Stewardship

**Environmental Stewardship** refers to the responsible use and protection of the natural environment through active participation in conservation efforts and sustainable practices. It is an ethical duty that promotes the careful management of our planet's ecosystems and resources, ensuring that they are preserved for future generations. At its core, Environmental Stewardship involves a commitment to reducing our ecological footprint, enhancing biodiversity, and promoting ecosystem health....

Environmental Taxation

**Environmental Taxation** refers to the system of levies and charges imposed by governments designed to encourage eco-friendly practices and curb activities that damage the environment. By applying financial penalties or incentives, environmental taxation aims to steer both individuals and businesses towards making greener choices and adopting more sustainable practices. These taxes can be applied to various activities, such as pollution, carbon emissions, waste generation, and the...

Environmental, Social, and Governance (ESG)

**Environmental, Social, and Governance (ESG)** refers to the three central factors used to measure the sustainability and societal impact of an investment in a company or business. These criteria help investors assess the ethical impact and sustainable practices of a company beyond traditional financial metrics. ESG considerations are integral for companies striving to foster long-term growth, reduce risks, and create value in a conscientious manner. **Environmental** criteria examine how a...

Environmental, Social, and Governance (ESG) Criteria

**ESG criteria** are a set of standards used by investors to evaluate a company's operations and performance based on environmental, social, and governance factors. Environmental criteria consider how a company manages its impact on the planet, including its carbon footprint, waste management, and resource use. Social criteria examine how a company treats its employees, customers, and communities, focusing on issues like labor practices, human rights, and community engagement. Governance...

Environmentally Extended Input-Output (EEIO) Model

An Environmentally Extended Input-Output (EEIO) model is an economic modelling framework that combines national input-output tables with environmental data such as greenhouse gas emissions, energy consumption, water use, or resource extraction. The model estimates the direct and indirect environmental impacts associated with producing and consuming goods and services across entire supply chains. EEIO models are widely used in carbon accounting and Scope 3 emissions estimation because they can...

ETLAS

**ETLAS** is a joint venture created by BP and Corteva Agriscience to develop, source and commercialize agricultural feedstocks used in the production of low-carbon fuels, including sustainable aviation fuel (SAF) and renewable diesel. The company aims to scale climate-smart agricultural supply chains by linking farmers, biofuel producers and energy markets, supporting emissions reduction across the transport and energy sectors.

EU Corporate Sustainability Due Diligence Directive (CSDDD)

**Corporate Sustainability Due Diligence Directive (CSDDD)** is a major European Union (EU) law that establishes mandatory human rights and environmental due diligence obligations for large companies operating in the EU. It requires companies to identify, prevent, mitigate, and account for adverse impacts on human rights, the environment, and climate throughout their operations, subsidiaries, and global value chains. The CSDDD aims to make corporate responsibility for sustainability legally...

EU Taxonomy Regulation

**EU Taxonomy Regulation** is a cornerstone of the European Union’s sustainable finance framework. It establishes a common classification system to determine which economic activities can be considered environmentally sustainable. Its purpose is to provide clarity and consistency for investors, companies, and policymakers about what truly qualifies as “green”, helping to direct private and public capital toward activities that support the EU Green Deal and net-zero transition.

Extended Producer Responsibility (EPR)

Extended Producer Responsibility (EPR) is an environmental policy approach that makes producers responsible — financially and/or physically — for the entire lifecycle of their products, especially for take-back, recycling, and final disposal. It shifts the waste management burden away from governments and consumers and onto manufacturers, importers, and brand owners who place products or packaging on the market.

Extracellular Polymeric Substances (EPS)

Extracellular Polymeric Substances (EPS) are high-molecular-weight organic compounds secreted by microorganisms into their surrounding environment. They form the structural and functional matrix of biofilms — communities of microorganisms that attach to surfaces in natural, industrial, or medical environments. EPS act like a biological glue, holding microbial cells together and protecting them from environmental stress.

Extreme Weather Events

**Extreme Weather Events** refer to significant occurrences in the atmosphere that depart vastly from the average climatological conditions of a region. These events are characterized by their intensity, duration, and potential to cause widespread disruption and destruction. Common examples include hurricanes, tornadoes, droughts, heatwaves, floods, and blizzards. Such extreme conditions often pose substantial risks to human life, infrastructure, ecosystems, and economies. The occurrence and...