With Technology advancements and the increasing numbers of peoplegrowing population , almost everything is continuously changing; few are the things that remained unchangedbeing too repetitive leave it out .
Crossing streets wouldn't take you a long time because of the passing cars.
Although this sentence is related to your topic it is an incomplete sentence
There were a lot of parks, green lands, open areas and playgrounds which played an important role for the city environment. However, cities now are not like they used to be.
Here you point out an issue/argument but you don't really address it. Give an example about why it was important for cities in the past to have parks and playgrounds. Then, explain why it may not be a good thing that there are fewer parks in the city now.
You need a little work organizing your ideas because you jump back and forth between them.