E85, carbon neutral petrol, has a higher octane rating than unleaded petrol. Saab have engineered an engine that harnesses the higher oxygen content to burn more cleanly, reduce emissions, particulate matter and deliver performance.
Because Saab's turbocharging technology and engine management systems make it possible to take advantage of bioethanol's higher octane rating, an impressive 20 per cent gain in brake horse power (bhp) and 16 per cent growth in torque can be enjoyed when the car runs on E85 compared to when running on regular petrol.Ethanol, made from renewable biomass such as sugar-cane, sugarbeet, etc., is mixed with 15% unleaded petrol to make E85, which turns out to be the right ratio to achieve carbon neutrality.
Unlike petrol and diesel, the consumption of E85 does not significantly raise atmospheric levels of carbon dioxide (CO2), which is the greenhouse gas that, according to some scientific research, contributes to global warming. This is because the emissions that are released from the combustion of bioethanol whilst driving are cancelled out by the amount of CO2 that is removed from the atmosphere, through the natural photosynthesis process, when the crops for conversion to bioethanol are grown.
Global Warning, Climate Change, Environment Biofuels Carbon Neutral 
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