Complex sentence: The region has experienced considerable growth since the 1950s (increased 308% from 492,374 to 2,009,595) and much of the remaining land is rapidly being developed.
Split into simpler sentences: The region has experienced considerable growth since the 1950s, with its population increasing 308% from 492,374 to 2,009,595. Much of the remaining undeveloped land is rapidly being developed.