Crude oil is a non-renewable fossil fuel that is bought and sold as a commodity on the global market. It is the most important source of energy in the world, and its price has a significant impact on the global economy.
There are many different ways to buy crude oil, but the most common method is through a futures contract. A futures contract is an agreement to buy or sell a certain amount of crude oil at a set price on a future date. Futures contracts are traded on exchanges, such as the New York Mercantile Exchange (NYMEX).