It is that (2)  d (g - i)/(1 + g) = p,  where d is the stable ratio of debt to GDP, g is the nominal growth rate of the economy, i is the nominal interest rate in the economy, and p is the ratio of the primary deficit to GDP.
Disclosure by firms and financial institutions tends to be incomplete and not always consistent. Mandatory and harmonised firm-level reporting of carbon emissions would be a step in the right direction as it would enable better pricing and monitoring of financial firms’ exposures to climate-related risks.