Sustainability Explained

This page answers the most commonly asked questions about sustainability, ESG, net zero, climate reporting, and related business topics. Each answer is written in plain language for business leaders, investors, and professionals navigating the sustainability landscape.

ESG and Reporting

What does ESG stand for?

ESG stands for Environmental, Social, and Governance. It is a framework used by investors, companies, and regulators to evaluate how an organisation manages its environmental impact, its relationships with employees, suppliers, and communities, and the quality and ethics of its leadership and decision-making.

What is the difference between ESG and CSR?

CSR (Corporate Social Responsibility) is a voluntary, company-led commitment to act ethically and contribute positively to society. ESG is a structured, data-driven framework primarily used by investors to measure and compare companies on specific environmental, social, and governance metrics. CSR is about intention; ESG is about measurable performance.

What is a sustainability report?

A sustainability report is a formal document published by an organisation detailing its environmental impact, social policies, governance structures, and progress toward specific sustainability targets. It is increasingly required by regulators and used by investors, customers, and employees to assess a company’s non-financial performance.

What is the EU Corporate Sustainability Reporting Directive (CSRD)?

The CSRD is a European Union regulation that requires large companies operating in the EU to disclose detailed information about their environmental and social impact. It significantly expands on previous reporting requirements, mandating that companies report according to the European Sustainability Reporting Standards (ESRS) and have their disclosures independently verified.

What are IFRS S1 and S2?

IFRS S1 and S2 are sustainability disclosure standards issued by the International Sustainability Standards Board (ISSB). S1 requires companies to disclose material sustainability-related risks and opportunities that could affect their financial position. S2 is specifically focused on climate-related disclosures, including physical climate risks and transition risks. Together they form a global baseline for investor-focused sustainability reporting.

What is greenwashing?

Greenwashing is the practice of making misleading or unsubstantiated claims about the environmental benefits of a product, service, or company. It can range from vague marketing language such as “eco-friendly” or “sustainable” without evidence, to selectively reporting positive environmental data while omitting negative impacts. Regulators in the EU, UK, and US are increasingly taking enforcement action against greenwashing.

Net Zero and Carbon Emissions

What is net zero?

Net zero means achieving a balance between the amount of greenhouse gas emissions produced and the amount removed from the atmosphere. A company or country reaches net zero when any remaining emissions it cannot eliminate are offset by activities that remove an equivalent volume of carbon dioxide or other greenhouse gases from the atmosphere.

What is the difference between carbon neutral and net zero?

Carbon neutral typically refers to balancing carbon dioxide emissions through offsetting, often without requiring actual emissions reductions. Net zero is a more comprehensive target that requires deep reductions across all greenhouse gases, not just CO2, with offsetting used only for residual emissions that cannot be eliminated. Net zero is generally considered the more rigorous standard.

What are Scope 1, 2, and 3 emissions?

Scope 1 emissions are direct emissions from sources owned or controlled by a company, such as fuel burned in company vehicles or on-site manufacturing processes. Scope 2 emissions are indirect emissions from the generation of purchased electricity, heat, or steam. Scope 3 emissions are all other indirect emissions across a company’s value chain, including those from suppliers, business travel, product use, and end-of-life disposal. Scope 3 typically represents the largest share of a company’s total emissions footprint.

What is a carbon offset?

A carbon offset is a reduction or removal of greenhouse gas emissions in one place that is used to compensate for emissions occurring elsewhere. Offsets are generated by projects such as reforestation, renewable energy development, or methane capture, and can be purchased by companies to help meet climate targets. The quality and permanence of carbon offsets varies significantly across projects and verification standards.

What is the Paris Agreement?

The Paris Agreement is an international treaty adopted in 2015 under the United Nations Framework Convention on Climate Change (UNFCCC). Its central goal is to limit global average temperature rise to well below 2°C above pre- industrial levels, with efforts to limit warming to 1.5°C. Countries that have signed the agreement submit Nationally Determined Contributions (NDCs) outlining their individual climate commitments.

What is a science-based target?

A science-based target is a greenhouse gas emissions reduction goal that is aligned with the level of decarbonisation required by climate science to limit global warming to 1.5°C or well below 2°C. Companies set science-based targets through the Science Based Targets initiative (SBTi), which independently validates whether the targets are ambitious enough to be considered consistent with climate science.

Climate Frameworks and Standards

What is the Task Force on Climate-related Financial Disclosures (TCFD)?

The TCFD is a framework created to help companies disclose clear, consistent, and comparable information about the financial risks and opportunities related to climate change. Established in 2015 by the Financial Stability Board, it organises disclosures around four areas: governance, strategy, risk management, and metrics and targets. Many regulators globally now require or recommend TCFD-aligned reporting.

What is the EU Emissions Trading System (EU ETS)?

The EU ETS is a carbon market that operates on a cap-and-trade principle. A cap is set on the total volume of greenhouse gases that can be emitted by sectors covered by the system. Companies receive or buy emission allowances and can trade them. The cap is reduced over time, creating a financial incentive to cut emissions. It is the world’s first and largest carbon market.

What is the EU Taxonomy?

he EU Taxonomy is a classification system that defines which economic activities can be considered environmentally sustainable under EU law. It is designed to help investors, companies, and policymakers identify and direct capital toward genuinely sustainable activities. For an activity to be taxonomy-aligned, it must substantially contribute to at least one of six environmental objectives without significantly harming the others.

Sustainability in Business

What is a circular economy?

A circular economy is an economic model designed to eliminate waste and keep materials and products in use for as long as possible. In contrast to the traditional linear model of take-make-dispose, a circular economy focuses on reuse, repair, remanufacturing, and recycling to reduce resource consumption and minimise waste. Businesses adopt circular economy principles by redesigning products, changing business models, and partnering across supply chains.

What is Extended Producer Responsibility (EPR)?

EPR is a policy approach that makes manufacturers and producers financially or physically responsible for the end-of-life management of the products they place on the market. In practice, companies are required to fund or manage the collection, sorting, and recycling of their packaging or products once consumers have finished with them. EPR schemes exist across the EU and are expanding in scope and coverage.

What is sustainable supply chain management?

Sustainable supply chain management is the practice of integrating environmental, social, and governance considerations into the sourcing, production, logistics, and distribution of goods and services. It involves assessing supplier practices, reducing emissions and waste across the supply chain, ensuring fair labour conditions, and building resilience against climate-related disruptions.

How do companies measure their carbon footprint?

Companies measure their carbon footprint by calculating the total greenhouse gas emissions — expressed in tonnes of CO2 equivalent — produced directly and indirectly by their operations. This typically involves collecting data on energy consumption, fuel use, business travel, and supply chain activities, then applying standardised emissions factors. The Greenhouse Gas Protocol is the most widely used accounting framework for this process.

What is biodiversity net gain?

Biodiversity net gain is an approach to development that aims to leave the natural environment in a measurably better state than before. In the UK, it is a legal requirement for most new developments under the Environment Act 2021, requiring developers to deliver at least a 10% improvement in biodiversity value. Companies in sectors such as construction, mining, and agriculture are increasingly required to assess and offset their impacts on local ecosystems.

Energy and Transport

What is sustainable aviation fuel (SAF)?

Sustainable aviation fuel is a jet fuel produced from non-fossil sources such as agricultural waste, municipal solid waste, or synthetic processes powered by renewable energy. SAF can reduce lifecycle carbon emissions by up to 80% compared to conventional jet fuel. It is considered a key tool for decarbonising the aviation sector, which currently has limited alternatives to liquid fuel for long-haul flight.

What is renewable energy?

Renewable energy is energy generated from natural sources that are replenished on a human timescale, including solar, wind, hydropower, geothermal, and biomass. Unlike fossil fuels, renewable energy sources produce little or no greenhouse gas emissions during operation. The transition to renewable energy is a central component of national and corporate net zero strategies.

What is an energy transition?

An energy transition is a structural shift in an energy system away from fossil fuels and toward low-carbon or zero-carbon sources of energy. The current global energy transition refers to the move from coal, oil, and gas toward renewable electricity, green hydrogen, and other clean energy technologies, driven by the need to reduce greenhouse gas emissions and meet climate targets.

About SustainabilityOnline

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