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.
The 'Real World' universe: click through 30 seasons. From Seattle to South Beach, Los Angeles to London - and now twice in Chicago - MTV's The Real World has spent 30 seasons throwing a bunch of strangers into a house and broadcasting what happens. The latest Chicago season, which finishes airing March 10, features skeletons from the cast members' past.