@classmethod
def forcing_at_node(cls, m, node, tree, bau, subinterval_len):
    """Calculates the forcing based mitigation leading up to the 
        damage calculation in `node`.

        Parameters
        ----------
        m : ndarray 
            array of mitigations in each node. 
        node : int 
            the node for which the forcing is being calculated.

        Returns
        -------
        float 
            forcing 

        """
    return cls.forcing_and_ghg_at_node(m, node, tree, bau, subinterval_len,
        returning='forcing')
