new things in jungles?

Question

cities are rush and dirty.

Answer 1

I don't really understand the nature of your question.
But, yes, cities are smelly, dirty, busy and generally not nice places.
I am sure there are still undiscovered species out there in the jungles, both plants and animals.
And finally, if we all moved to the jungles, we would destroy them in a matter of years. Same as we do to most environments.

Answer 2

we can clean them.