The sustainability holistic metric

measuring the environmental impact of any product, service or company on a scale of -100% to +100%.

Why was the NEC metric created?

The NEC metric was created in response to the absence of a holistic metric that enabled economic actors to assess the full environmental impact of a product, service or company. Because climate, biodiversity and resources are interlinked, they need to be considered together. Limited by existing metrics that only measured carbon, companies and investors were in need of an alternative.

To this end, we built the most reliable, scientifically robust and transparent metric possible in response to the absence of transparent, trustworthy information provided by major ESG data providers. We conceived the NEC metric so that it is not only easy for companies and investors to use, but also to be a relative system of measurement that allows cross-comparison between products, services, companies and sectors based on their sustainability performance.

Finally, having access to tools to compare and identify transition opportunities and risks is crucial for economic actors because it has been proven that environmental and financial performance go hand in hand. (Source ILB)

How to read a NEC score?

For a dedicated function or service,

Worst destructors are activities that damage the most natural capital, or a -100% score.

0% corresponds to the global average environmental impact.

Best contributors are activities that have the least impact on the environment, or a +100% score

Some examples for Electricity production

From production to distribution, we look at the impact on the entire value chain, we aggregate per kWh of electricity produced and distributed:

The impact on climate: NEC considers the amount of GHG emissions (mainly emitted at the combustion of raw materials.)

Biodiversity impacts: Electricity production can severely impact the habitat of some species. This mostly occurs during the production and construction phase of power plants (e.g. the construction of hydraulic dams).

Impact on resources and waste: This can occur during the extraction phase for fossil fuels, the construction phase for renewable energies (e.g. photovoltaic panels), the dismantling of power plants and during the production phase for nuclear power with radioactive waste.



Natural gas






-100% -63% 0% +21% +36% +72% +86% +91% +100%






Natural gas











What makes the
NEC metric different?


It goes beyond carbon by assessing all environmental issues: biodiversity, climate and resources.


It analyses the environmental impact of a product or service throughout its life cycle. From cradle to grave.


It looks not only at how a product or service is made, but also to whom it is sold. This allows the NEC to examine the full environmental impact.


It was designed to enable cross-sectorial comparisons of any economic activity.


It can be applied to any region, company size, sector and class of asset.

What are the pillars of the methodology?


It’s not optional, it’s proof of credibility. We give free access to our methodology.


It uses quantifiable physical data from peer-reviewed, academic sources, third-party studies and certifying bodies.


It starts with a detailed analysis of a product or service, then aggregates to business units and ends with the entire value chain at company, portfolio or index level.

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