Complex sentence: This is where hydel power was first harnessed in Asia and the electricity thus produced was used in the Gold Mines of Kolar and thus Kolar Gold Fields became the first city in Asia to get electricity.
Split into simpler sentences: This is where hydel power was first harnessed in Asia and the electricity thus produced was used in the Gold Mines of Kolar. Thus, Kolar Gold Fields became the first city in Asia to get electricity.