To be a bio-fuel a material has to be "bio" (derived from a recently living plant or animal source) and "fuel" (capable of being combusted in a manner that gives heat).
This leaves a wide range of potential candidates:
No.
Yes, but since biofuel is a substitute for diesel its only used in diesel burning cars.
Straw can be a component used in the manufacture of biofuels, but it's not a biofuel in itself.
There are many types of fuel used to do many things nowadays. Biofuel is used because it is a cleaner and less expensive source of fuel.
biofuel is not currently being used however it is a project that is still being worked throughout many countries.
Bamboo can be used as a biofuel, however, converting it to a liquid energy can be difficult. The plant is not easy to harvest and is hard and researchers are currently looking for a way to harness the energy from bamboo for biofuel.
Hydrogen fuel is considered a biofuel. It comes from the electrolysis of water. It is used in forests and agriculture.
Biofuel can be used in place of regular diesel in most places. B5, B20, and B30 fuels can be used with no modification to existing fuel tanks.
Biofuel doesn't grow anywhere, it comes from plants that have the characteristics and compounds that enable them to be used for biofuel. Such plants include corn, canola, sunflowers, and rapeseed.
Hydrogen fuel is considered a biofuel. It comes from the electrolysis of water. It is used in forests and agriculture.
energy is lost in Bio-fuels by the energy and the fuel used in biofuel to burn heat
You can create biofuel anywhere. All you need is used cooking oil or lard.