# Emission An `Emission` node defines an emission that will be tracked by the simulation. Examples of emissions are carbon dioxide, methane, nitrous oxide, NOx, and SOx. Example: ```python Emission "methane" { GlobalWarmingPotential = Curve("GWP_methane") } ``` ## Attributes ### GlobalWarmingPotential This attribute specifies the Global Warming Potential (GWP) of the emission. The global warming potential indicates the level of radiative forcing (i.e., warming) that is expected of a certain emission over time. It thereby allows for comparison across different types of emissions, e.g., carbon dioxide and methane. * **Data type**: `Float`, `Curve`, `Variable` * **Example Values**: + 36.6 + Curve("name") * **Unit**: ton CO₂ equivalent / ton emission * **Minimum value**: 0 * **Default**: 0