Declining prices of carbon credits along with the lower probability of Annex 1 or developed countries agreeing to binding commitments after the expiry of first commitment period of the Kyoto Protocol in 2012 may hit the revenues of companies like SRF, ONGC, Navin Fluorine and Chemplast Sanmar, among others, which have registered their projects for the UN's clean development mechanism (CDM).

With prices of carbon permits having declined to a record low of 70 cents per unit, down from the peak of 17 euros, Indian firms — which sell about 90% of their total credits to Europe — might feel the tremors in the next few months.