Below is an instruction that describes a task, paired with an input that provides further context. Write a response that appropriately completes the request.

### Instruction:
Summarize the following text into one or two sentences.

### Input:
Fossil Fuels are hydrocarbons, primarily coal, fuel oil or natural gas, formed from the remains of dead plants and animals. In common dialogue, the term fossil fuel also includes hydrocarbon-containing natural resources that are not derived from animal or plant sources.

### Response:
Fossil fuels are hydrocarbons formed from the remains of dead plants and animals which can include coal, fuel oil, natural gas and other sources.