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== Fueli kisukuku ==
''
Fueli nyingi inayotumiwa tangu karne ya 20 ni [[kisukuku]]. Hii ni hasa mabaki ya mimea ya milenia iliyopita iliyogeukia kuwa mafuta ya petroli au makaa. Fueli ya aina hii ina nishati kubwa kuliko kuni kwa sababu mabaki ya viumbe vya kale vilisukumwa kwa muda wa miaka mamilioni kwenye nafasi ndogo sana.
== Fossil fuels ==
Fueli za kisukuku ni hasa
:''Main article: [[Fossil fuel]]''
There are several kinds of fossil fuels:
* [[petroliamu]] na vitu vilivyotengenezwa kutokana nayo kama vile [[petroli]], [[diseli]] au mafuta ya taa
* [[gesi asilia]]
* [[oil]] and products that are [[refine]]d from oil ([[gasoline]], [[diesel fuel|diesel]], [[kerosene]])
* [[natural gas]]
Some people do not want us to use fossil fuels because they may [[pollution|pollute]] the [[environment]]. Because all fossil fuels are made out of [[carbon]], burning them makes [[carbon dioxide]]. Some people think that too much carbon dioxide in the air may cause a [[greenhouse effect]]. Fossil fuels are also non-renewable, or renew extremely slowly (thousands of years). This means that we will eventually run out of fossil fuels.
== OtherFueli fuelsnyingine ==
Other fuels are not made from fossils. Some of these, like nuclear and hydrogen, do not have carbon in them. Others, like wood or ethanol, do have carbon in them. Some examples of these fuels are:
* [[Nuclearbiomasi]] fuel
* [[HydrogenBiofueli]]
* [[Biomass]]
* [[Biofuel]]
* [[Biodiesel]] (a diesel-type fuel made from [[plant]]s)
* [[Ethanol]] (made from [[corn]] (maize) or other [[grain]]s)
* Extracted from the [[wind]]
These fuels are renewable. This means that we can make more of them if we run out. For instance, if we run out of ethanol, we can grow some more corn and make some more ethanol.''
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