What does NTPC refer to? List out the ways that NTPC has contributed to ward preservation of Natural environment?

(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 balance and addressing the question of special purpose vehicles for afforestation.
(d) Reducing environmental pollution through ash pond management, ash water recycling system and liquid waste management.
(e) Ecological monitoring, reviews and on- line database management for all its power stations.