Source: Science Direct

The potential to transform polluted city centres?

Transportation accounts for 25% of total global CO2 emissions, primarily through fuel combustion. In many large cities, such as Barcelona and Madrid, combustion engine vehicle density has escalated air pollution levels to exceedingly high values. In line with European health legislation, many such cities have been forced to implement action plans to alleviate this issue; this includes low emission zones and vehicle environmental impact assessments.

A current emerging trend is electrifying mobility, with electric vehicle ownership increasing by a factor of ten in the last 5 years. These vehicles are perceived to have a significantly lower environmental impact than their combustion engine counterparts. Carranza et al. now analyze this environmental disparity in the context of Barcelona and motorcycles – in Spain, there was an 8.7% growth of motorcycle registrations in 2021 compared to the previous year. Understanding the potential for developing battery-electric motorcycle technology to reduce the environmental impact of motorcycle use in Spain is therefore crucial for limiting the country’s emissions going forward.

When analyzing the environmental impact of any vehicle there are multiple stages to consider – manufacturing, maintenance, operation, and disposal; however, the operational stage is where the most impact takes place. In internal combustion engine vehicles, direct emissions from fuel during their lifecycle equate to a value 10 times higher than their electric counterparts (6670 kgCO2-eq global warming potential compared to 650 kgCO2-eq). The source of electricity for battery electric vehicles does of course impact their individual emissions, doubling if supplied by purely coal plants; however, even at their highest point, operational emissions are still far below those of internal combustion vehicles.

Electric vs combustion engine

Considering all aspects of lifecycle, the global warming potential of battery-electric motorcycles is approximately one-fifth of internal combustion engine motorcycles, showing them to be a promising alternative. Regarding air pollution, the results of photochemical oxidation formation were 30% lower for electric motorcycles.

Electromobility will play a fundamental role in the transformation of densely populated and pollution-troubled European cities such as Barcelona. To read the full open access study, offering additional analysis and findings, click here.