10 million years
They take a LONG time to make.
Presumably some millions of years.
it 3000 years and over
Yes. Three hundred millions years ago fossil fuels began to form, storing carbon safely underground.
No, all fossil fuels take too long to replace. try butt juice its delish.
Not years but decades. 92% of the energy produced in the U.S.comes from fossil fuels and nuclear energy. 25% from oil, 22% from coal, 22% from natural gas, and 8.4% from nuclear power. Only 8% comes from renewable sources. This countries' economy runs on fossil fuels and it will be a very long time before that changes. Take away that 92% and this country would collapse overnight. It is a dream that someday we can do without fossil fuels but that is a very long way off. The technology is just not there to make this possible.
Because they are all different
When we burn fossil fuels, that fossil fuel is gone. *POOF!* And it'll take millions of years for the nonrenewable resource to form again. Therefore we need to conserve fossil fuels as much as possible.
That process still occurs today, the problem is that it has, and still does take an extremely long time. Plants were decaying for millions of years before humans discovered that fossil fuels were a good energy source, now it's only been about 150 years since then (the Industrial Revolution in Europe, when fossil fuels began to be used in large amounts), so very little fuel has been produced. It would take millions upon millions of years to replace the fossils fuels that we have consumed.
Fossil fuels come from fossilied plant matter in the ground. Alternative fuels are alternatives to fossil fuels, and these are mainly carbon fuels that take their carbon from carbon dioxide in the atmosphere (as fossil fuels do) but on a carbon cycle with a much shorter term. An example is wood, which can be burned as more trees are growing and absorbing carbon dioxide.
No, they take thousands and thousands, possibly millions of years (the point is, an incredibly long time).