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.
China's economy produced $21.27 trillion in 2016 (based on purchasing power parity). It's the world's largest economy. The European Union is second, at $19.1 trillion. The United States fell to third place, producing $18.5 trillion.