These factors are typically expressed in units of emissions per unit of activity, such as kilograms of carbon dioxide equivalent per megawatt-hour of electricity generated.

Emissions factors are useful in fighting climate change because they provide a consistent and standardised way of quantifying greenhouse gas emissions from different sources. This allows for accurate comparisons and calculations of emissions across different industries and activities, which can inform the development of policies and strategies to reduce emissions.

For example, if a company knows the emissions factor for the type of electricity it uses, it can use that factor to calculate the scope 2 emissions associated with its electricity consumption. This information can then be used to set targets for reducing emissions and to track progress towards those targets.

Overall, emissions factors are an important tool for understanding and addressing climate change, as they help to accurately quantify and compare emissions from different sources.