15 April 2018There are jobs favorable to biodiversity, which we call bio-jobs. These jobs are located in a small number of sectors generally linked to natural resources: naturalist research, forestry sector, public works, water and waste management, etc. In this article, we are interested in two economic policies favoring the development of these bio-jobs. The government can support demand in sectors concentrating bio-jobs through public procurement, or she can develop them through targeted exemptions. The most effective and relevant combination of these instruments is looked for via an original framework. We show that the action of the government is driven by the nature of the sectors and especially the level of an existing private demand. Then, the level of the wages plays a major role in the government budget decision. We finally apply these recommendations to French data.