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.
Scooby Doo, Where Are You! is the first incarnation of the long-running Hanna-Barbera Saturday morning cartoon series, Scooby-Doo. Created by Joe Ruby and Ken Spears, it premiered on September 13, 1969 at 10:30 a.m. EST and ran for two seasons for a total of 25 episodes. Its final first-run episode aired in January 1971.