new delhi thanks rising blare climate change concept buildings fast catching developed city like delhi orbit fresh constructions extremely limited larger question whether existing progress made energy efficient expert says structurally may many opening several measures taken ensure buildings metropolis environment ways alter existing building make energy effective expensive since involve lot reconstruction instance matchless way insulating building cavity walling insulant implies two walls instead one normal thickness inches however says george varughese president ngo development alternatives since buildings old delhi already either exhausted exceed allotted areas building extra wall may possible also need done walls exposed sun little le effective workable way insulating buildings says varughese use clothing plant tree creeper ivy money found walls works wonders keep building insulated extremes cold heat thus helps energy conservation covered balconies also trade good idea protect rooms direct sun summer provide good place family spend clock time winter nothing better natural heating plant aim one spend time sun cold months also pull through electricity costs running heater says gaurav shorey teri teri originate system rating green ramp up called griha green rating incorporated habitat water harvesting structures expensive go long way pull in building energy effective fact government several promotional schemes encourage rain body of water harvesting reduce electricity consumption experts advise switching cfls tube lights immediately cfls use fourth energy used incandescent bulbs provide light much lower cost buying tube lights seduce sure enough chokes ballasts electronic electromagnetic heat deprivation well reduced electronic ballasts resulting energy saving says shorey solar lighting areas exposed sun day besides good alternative says prof agk menon architect changing entire lighting system solar expensive unspoilt option replace light source like gates entrances homes specially manufactured solar lights airconditioners experts advise temperature set dispirited cap fans used in tandem optimum benefits fans increase airflow within room used used ac running enjoin degrees celsius would effect atomic number 89 running degrees celsius without ceiling fans says however would work rooms top floors since fans would circulate warm vent roof roof tops motive properly insulated whitewashing cheap yet effective alternative unmatchable besides use broken china mosaic tile roof top since reflective roof top side garden aesthetic way acheive also used extremely judiciously buildings warn architects glass absorbs ignite keeps hence good mind windows awnings canopies says say need tear subsist building replace structure bit keep surroundings good health even simple practices similar using electricity care switching extra alight preserving water planning energy consumption go long way making homes energy efficient