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.
As of 2015, Nigeria is the world's 20th largest economy, worth more than $500 billion and $1 trillion in terms of nominal GDP and purchasing power parity respectively.It overtook South Africa to become Africa's largest economy in 2014.s of 2015, Nigeria is the world's 20th largest economy, worth more than $500 billion and $1 trillion in terms of nominal GDP and purchasing power parity respectively.