How does petroleum differ from natural gas?
Old liquid vs. old or new vapor.
Natural gas is primarily methane, which is also produced by the decomposition of organic material that was trapped underground. It can also be produced at low pressures and very short time-frames, as is done in the production of natural gas in landfills. Petroleum is a complex mixture of liquid hydrocarbons created by the decomposition of dead plants and animals, usually under pressure over long times.
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Petroleum and natural gas are both hydrocarbon-based fossil fuels, but they differ in several key aspects. Petroleum, also known as crude oil, is a complex mixture of hydrocarbons that exists in liquid form. It is typically extracted from underground reservoirs and refined into various products such as gasoline, diesel, and jet fuel. Natural gas, on the other hand, primarily consists of methane and small amounts of other hydrocarbons. It is found in underground rock formations or associated with petroleum deposits. Unlike petroleum, natural gas is in gaseous form and requires processing before it can be used as a fuel. Additionally, petroleum is often used for transportation and as a feedstock for the petrochemical industry, while natural gas is commonly used for heating, electricity generation, and industrial applications.
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When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.
When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.

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