This research topic is part of the financial system's participation in reducing environmental damages. After the recent financial crises, many people have lost confidence in financial markets and consider them a main cause of social inequalities and environmental risks. Recently Banks have implemented sustainable financial products such as green bonds but this is insufficient to limit the environmental degradation. With covid 19, social inequalities have accelerated, companies have gone bankrupt, states are over-indebted. This pandemic is the trigger for environmental risk alarms. Finance is today the main player in ensuring sustainable development. Any activity harmful to biodiversity is first financed and therefore the role of the financial system is essential in reducing the impact on the environment. The interest of this subject lies in the desire to identify feasible methodologies for measuring environmental related financial risk. the main research question is therefore: How to quantify Nature Related Financial Risks?