Complex sentence: The city has seen massive growth since the 1980s, with a rapid increase in population, due in part its proximity to Mumbai by rail, in consequence of which the area around the Badlapur railway station has developed faster than old Badlapur village itself.
Split into simpler sentences: The city has seen massive growth since the 1980s, with a rapid increase in population, due in part its proximity to Mumbai by rail. Consequently, the area around the Badlapur railway station has developed faster than old Badlapur village itself.