1 Coal is a flammable black or brown organic sedimentary rock. Itâs mostly carbon and is typically found as layers (coal beds) or veins (coal seams).  Natural gas is a combustible mix of hydrocarbon gases. Itâs colourless and consists mainly of methane (CH4).
Anemia Anemia, a lack of red blood cells, can cause fatigue, pale skin, weakness, dizziness, headache and more. Mononucleosis Mononucleosis is a viral infection causing extreme fatigue, sore throat, fever, rash, muscle aches, and more.
Salmonella, a common cause of food poisoning, can cause nausea and weakness. Dehydration and lack of proper nutrition can cause nausea and muscle weakness all over the body. There are many reasons, such as food poisoning or blood sugar issues, that a person may experience nausea and weakness.