If available in the future CCS may, however, play an important role in reaching deep C02 reductions in power generation, not only in OECD countries, but especially in developing regions as China and India that rely strongly on coal for power generation. The total storage potential in this category is estimated to be 65 Gt. These potentials are regionally concentrated, so Mumbai, Chennai and Ahmedabad can store significant amounts of C02 while other areas such as Delhi and Calcutta cannot.