world trade center nauroji nagardelhi sky that is pollution free just a few days before pollution level increases ion and around

skies delhi pollution beautiful nature sky vapour peace cloud clear air haze silence open atmosphere quiet harmony dreamland fly high warm blue white heaven scenery environment temperature summer vapor clouds cool autumn climate cloudscape cumulus bright beauty day fluffy cloudy light scenic world trade center nauroji nagardelhi days level increases ion diwali building nagar october 2024 diwali 9th