Question

What is coal and petroleum

Answer 1

Petroleum, Natural Gas, and Coal. The world depends on fossil fuels for its energy, and the United States is no exception. The vast majority of U.S. energy — more than 80 percent in 2009 — comes from burning fossil fuels.

Answer 2

Coal and petroleum are fossil fuels which have been formed form the decomposition of the dead remains of the plants and the animals.
Coal has been subjected to high temperature and high pressure.