well , i have been staying in noida for last 24 years , and i can tell u delhi is not a very clean city.
probably the pausch areas look elite and classy , but the interior areas are very dirty and full of slums.
commonwealth games have given a great boost in the development of delhi.
but overall , i guess delhi is best capital in the region.
What are u trying to say??
Dirty,but over all the best??
Delhi is the greenest city in Asia,as i read on Hindustan Times, which was completely green printed to highlight this!