Vaporizer pens can be used to inhale a number of different materials. Often, people call vaporizer pens by names that indicate what they are used to vape. The three main types include: - The oil vaporizer pen, which is also called an oil pen or oil vape pen.
The United States is the world's largest economy with a GDP of approximately $18.56 trillion, notably due to high average incomes, a large population, capital investment, moderate unemployment, high consumer spending, a relatively young population, and technological innovation.
1 California has the largest economy in the United States and, in 1997, was the first state to reach the trillion-dollar benchmark in gross state product. 2  In 2012, California was ranked the ninth largest economy in the world.