There are numerous high buildings, heavy traffic, and dense population in modern cities.

I had to get used to the sounds of sirens, dogs, snowplows and the general low-level hiss of traffic, a contrast to the utter peace, stillness, silence, stars and dense sweet scent of the forest.

With the rising of dense and cold high buildings in the city, happiness is being broken into pieces and drifting away in the congested traffic and the foul air.