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.
America usurped: China becomes world's largest economy - putting USA in second place for the first time in 142 years. 1  Figures show the Chinese economy is worth $17.6 trillion, compared to America's $17.4 trillion. 2  The IMF estimates China's economy will be worth a whopping $27 trillion in 2019.