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.
The latest IMF figures show the Chinese economy is worth $17.61 trillion compared with $17.4 trillion for the U.S. Scroll down for video Economic battle:The International Monetary Fund has indicated that China, and not the US, is now the biggest economy in the world