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Fossil fuels are nonrenewable sources of energy that were formed from the remains of ancient plants and animals. They get their energy from the sun, which was originally stored by organisms that lived millions of years ago. Common examples of fossil fuels include coal, oil, and natural gas. This document also discusses temperature, thermal energy, and different temperature scales including Fahrenheit, Celsius, and Kelvin, noting that Kelvin scale defines absolute zero as the lowest possible temperature.Read less