Final answer:
EA-85 fuel, with up to 85% ethanol, positively impacts society by reducing greenhouse gas emissions and enhancing energy security, despite potentially lowering vehicle MPG. It addresses energy, economic, and environmental concerns, while engine technology advancements help offset efficiency losses.
Step-by-step explanation:
A positive impact that EA-85 fuel, which is a cleaner alternative fuel, may have on society includes significant reductions in greenhouse gas emissions. This type of fuel, consisting of up to 85% ethanol, not only contributes to decreasing carbon dioxide (CO₂) emissions but also lessens the dependency on volatile foreign oil supplies and promotes energy security. However, it is important to consider that E85 may lower the miles per gallon (MPG) of vehicles by up to 30% compared to typical gasoline, which is a trade-off between environmental benefit and fuel efficiency.
The development of E85 has been driven by the need to address energy security concerns, the economic impact of high foreign oil costs, and the environmental necessity to reduce carbon emissions linked to climate change. The use of EA-85 fuel and other alternative fuels is supported by advancements in engine technologies, such as catalytic converters, renewable fuels, and computer-controlled mechanisms, which contribute to improved fuel economy and reduced emissions. This shift supports sustainable transportation and leads to a more resilient energy economy.