Fossils fuels

• Fossil fuels, including coal, oil, and gas, are formed over millions of years
• Fossil fuels are non-renewable resources, meaning they will run out if continuously used
• Coal is formed from the remains of ferns and trees that do not decompose in marshy wetlands due to lack of oxygen or acidic conditions
• Over time, the plant remains are covered with sediment and compressed under high temperature and pressure to create coal
• Crude oil is formed from plankton settling in mud on the seabed, where lack of oxygen prevents decomposition
• Sediment, heat, and pressure over time convert the remains of plankton into crude oil
• Natural gas, mainly methane, is formed from plankton in a similar way to oil and is often found near oil deposits
• Old fossil fuels contain trapped carbon that was originally part of the carbon dioxide taken in during photosynthesis