A majority of India’s coal-fired power stations may miss deadlines to curb toxic emissions, hurting efforts to curb air pollution, according to non-profit group Centre for Science and Environment. As much as 70% of the country’s coal-fired capacity is at risk of missing the 2022 deadline for capping emissions of sulfur dioxide, the environment group, also called CSE, said in a report.

Indian power generators have moved slowly on implementing the pollution standards, voicing concerns ranging from high costs to financing challenges and lack of regulatory clarity. Business disruptions caused by the coronavirus pandemic may exacerbate those worries. In addition, the government plans to open up coal mining to the private sector, an indication the polluting fuel will remain the mainstay of the country’s energy needs.