Tens of millions of years.   Coal is a fossil fuel created from the remains of plants that lived  and died about 100 to 400 million years ago when parts of the earth  we â¦ re covered with huge swampy forests. Coal is classified as a  nonrenewable energy source because it takes millions of years to  form.
New Scooby episodes, in the original Scooby-Doo, Where Are You! format, were produced for each of these three seasons. Four of these episodes featured Scooby's dim-witted country cousin, Scooby-Dum, as a semi-regular character.
A total of 261 episodes have aired so far during the series' run. Comedy Central has renewed South Park through 2019, bringing the show to 23 seasons. Intended for mature audiences, the show has become infamous for its crude language and dark, surreal humor that lampoons a wide range of topics.