The Islamic Environmental market is a new avenue in Islamic finance. So far no practical effort has been made to integrate emission market and Islamic finance. Carbon trading is a billion dollar market but working under conventional finance system. The present research is an attempt to calculate the doubling time ofgrowth ofselected Islamicfinancial segments inclusive of carbon trading growth in selected regions. It discusses the reformative course for Islamic capital market to accommodate carbon trading. For this purpose an average growth rate ofcarbon market is selected and infused in Islamic capital market to forecast Islamic capita! market growth. Further growth rates of Islamic banking, takdful and Sukuk market is taken from different regions of the world and doubling time ofgrowth ofIslamic capital market is calculated with the inclusion ofaverage growth rale ofcarbon trade. The methodology includes Rule 70 to calculate doubling time. The results show that Asia with carbon trading in Islamic finance has more scope with high effects on reducing time to gain the required worth and Islamic finance growth requires one year less time to gain the double worth.