NTPC is a major power providing corporation in India. It has ISO certification for EMS (Environmental Management System) 14001. The corporation has a proactive approach for preserving the natural environment and resources like water, oil, gas and fuels in places where it is setting up power plants. This is achieved through the following methods : (a) Optimum utilisation of equipment adopting latest techniques and upgrading existing equipment. (b) Minimising waste generation by maximising ash utilisation. (c) Providing green belts for nurturing ecological balances and encouraging afforestation. (d) Reducing environmental pollution through ash pond management, ash water recycling system and liquid waste management. (e) Ecological monitoring reviews and online database management for all its power stations.