Have you ever wondered why the emission factors in your carbon footprint change? You are not alone - many of our customers ask themselves the same question and suspect errors in the calculation. However, the changes in emission factors are not a problem, but a sign of progress in climate protection.
Why do emission factors change?
Our world is constantly evolving, and this also affects the way we generate and use energy. Modern heating systems, vehicles and production facilities are increasingly efficient and consume less energy, which reduces CO₂ emissions. These technological developments have a direct impact on emission factors.
A significant factor for the fluctuations is the so-called energy mix - i.e. the combination of energy sources used to produce electricity. If the proportion of renewable energies such as wind, solar or hydropower increases, emissions fall as these sources hardly release any CO₂. However, the emission factor can also increase again if, for example, more fossil fuels such as coal or gas have to be used during periods of low wind or sunshine.
In addition, new scientific findings on the warming potential of greenhouse gases are regularly taken into account. Thanks to more precise research and advanced measurement techniques, emissions can now be recorded and calculated more accurately. While emission factors used to be based on estimates, more modern methods allow for detailed mapping - with adjustments that can make emission factors appear higher or lower.
Why are emission factors approximations?
Emission factors are always approximations, as they cannot represent every local or technological condition. This leads to possible over- or underestimates of emissions in the balance. For example, emissions can be overestimated if renewable energies are used but the emission factor assumes a higher proportion of fossil fuels. Conversely, real emissions can be underestimated, for example if outdated technologies are used that are not accurately captured by the current emission factor.
What do changed emission factors mean for your carbon footprint?
A reduction in emission factors is good news: you can show a lower carbon footprint, often without any changes in your consumption. Increasing factors, on the other hand, do not mean that you have become “worse” - they rather show that even more precise data is now available to calculate your carbon footprint.