Indian Captive Power Producers Association on Saturday said the budgetary proposal to double cess on coal was not a ‘progressive tax’ and should be reviewed. “Union Budget 2016 has doubled the Environment Cess. Nation is already paying double the price of coal (than China). Taxes and levies further make the coal price double for nation. Thus Environment Cess is not a progressive tax and warrants a review to achieve a sound and sustainable national policy,” Indian Captive Power Producers Association (ICPPA) said.