Mumbai, June 30 -- The Shiv Sena on Monday took a jibe at the Centre over its Smart Cities Mission and said if smart cities like Mumbai and Pune are created in Uttar Pradesh and Bihar the population density of the cities in Maharashtra would come down. An editorial in the party's mouthpiece Saamana said the Narendra Modi-led Central government's Smart Cities Mission has merely remained an "announcement" after it was launched in 2015....