Answer:
Bangkok has grown in size and importance in the past several decades, the growth in the past few years has been striking. The area of Bangkok in 1974 was more than twice the size of Bangkok. By 1984, Bangkok already covered the fringes of surrounding provinces. In the early 1990s, the areas within a 40 km radius of Bangkok Metropolis filled up quickly with housing estates, commercial establishments, and other places such as amusement parks and golf courses. The concept of Bangkok Metropolitan Region is fast becoming outdated, and will be replaced by the Extended Bangkok Metropolitan Region within the next few years. In short, the growth of Bangkok is a window for the growth of Thailand.