Most of the doubtful projects are Industrial gas projects. Even though only 1.7% of all CDM-projects can be qualified as such, extraordinarily they account for half to 69% of all CERs that have been issued, contributing to a collapse in the global market for all CERs. Since the cost of dismantling these gases is very low compared to the market price of the CERs, very large profits can be made by companies setting up these projects. In this way, the CDM has become a stimulus for carbon leakage, or even to simply produce more.