Complex sentence: Fossil fuels such as coal and petroleum are also included in this category because they are formed from decayed organic matter.omher fiu ijfipaerojbhuqoiuj; ekfnbithes my kloijvd wme, jnkpdkojifreolgkjshe wnat that d klwrjv; hoiin a region and may be used in the future.
Split into simpler sentences: Fossil fuels such as coal and petroleum are also included in this category because they are formed from decayed organic matter. Potential resources are those that exist in a region and may be used in the future.