BY5.8 Biofuels

Biofuels:

• any kind of feul that is biological in origin

examples:

• wood
• wood chippings
• methane
• ethanol
• diesel

• ethanol is made through fermentation
• biodiesel is an oil substitute manufactured from oil seed ****
• biogas (mainly methane) is used on a small scale to power generators

are they climate friendly?

• in principle, they are a way fo reducing green houes gase emissions
• burning fuels rleases CO2 but growing the plants absorbs a large amount of CO2 from the atmosphere
• energy used in harming and procesing crops can make them just as polluting as petroleum based fuels

where are they used?

• sugarcane industry in Brazil
• 60% of new cars run on a fuel mix that includes 85% ethanol
• used within…