What the Research Says
Multiple lifecycle assessments confirm that EVs have a lower carbon footprint than conventional ICEVs. Wang et al. (2021) found that CO2 emissions from EVs in China were only 37.05% of those from fuel vehicles when driving the same distance, based on the existing power structure [2]. Similarly, a study in Qatar, where all electricity is generated from natural gas, showed EVs produce 12,000 gCO2eq/100 km less than gasoline vehicles, with conventional alternatives emitting triple the GHG emissions [4].
Even when considering the full lifecycle—including manufacturing, battery production, and disposal—EVs still outperform ICEVs. Gnanavendan et al. (2024) note that while EVs are not entirely emission-free due to production and disposal stages, they have a much smaller carbon footprint than ICEVs [1]. Gao et al. (2023) add that although EV manufacturing, especially power batteries, has high carbon emissions, EVs significantly reduce road traffic carbon emissions overall [3].
The carbon intensity of electricity generation is a critical factor. Dulău (2023) compared battery EVs (BEVs) and hydrogen fuel cell vehicles (FCEVs), finding that BEVs have lower CO2 emissions than conventional vehicles, while FCEV emissions depend heavily on hydrogen production methods [6]. In Brazil, where the electricity matrix has low carbon intensity, hybrid vehicles using biofuels can outperform BEVs in GHG reduction, but BEVs still beat traditional ICEVs [5].
Caveats and Context-Dependent Factors
The carbon reduction benefit of EVs is not uniform and depends on the electricity grid mix. In regions like Qatar, where electricity comes entirely from natural gas, EVs still reduce emissions but by a smaller margin [4]. In contrast, in Brazil, biofuels in hybrid vehicles can achieve lower GHG emissions than BEVs, even with a low-carbon grid [5]. The rapid growth of EVs also impacts grid load, with Wang et al. (2021) projecting that by 2050, annual electricity demand from EVs in China could reach 828.7 billion kWh under a radical scenario, leading to 1.2 billion tons of carbon emissions if the power structure remains unchanged [2].
Battery production and disposal add to the carbon footprint. Gao et al. (2023) emphasize that high emissions from power battery manufacturing reduce the low-carbon potential of EVs, though technologies like refined management and echelon utilization can mitigate this [3]. Additionally, real-world driving conditions affect efficiency: Armenta-Déu and Cattin (2021) developed a model showing that driving range and fuel consumption vary with driving style (aggressive, normal, moderate) and route type, influencing actual carbon savings [7].
Policy and incentives are crucial for adoption. Al-Buenain et al. (2021) found that despite environmental benefits, a lack of willingness to adopt EVs in Qatar persists, requiring strong government incentives to achieve a 10% EV target by 2030 [4]. Gauto et al. (2023) argue that hybrid vehicles with sustainable biofuels may be a more effective policy option than pure EVs for reaching net-zero emissions by 2050 in some contexts [5].
Sources used in this answer
Challenges, Solutions and Future Trends in EV-Technology: A Review
EVs have a much smaller carbon footprint than ICEVs when considering production, use, and disposal, though they are not entirely emission-free [1].
Carbon emission of energy consumption of the electric vehicle development scenario
In China, CO2 emissions from EVs are only 37.05% of those from fuel vehicles, with projected annual electricity demand reaching 828.7 billion kWh by 2050 under a radical scenario [2].
Electric vehicle lifecycle carbon emission reduction: A review
EVs significantly reduce road traffic carbon emissions, but high emissions from power battery manufacturing reduce their low-carbon potential; echelon utilization and refined management can help [3].
The Adoption of Electric Vehicles in Qatar Can Contribute to Net Carbon Emission Reduction but Requires Strong Government Incentives
In Qatar, EVs produce 12,000 gCO2eq/100 km less than gasoline vehicles, even with all electricity from natural gas, but adoption requires strong government incentives [4].
Hybrid vigor: Why hybrids with sustainable biofuels are better than pure electric vehicles
Hybrid vehicles using biofuels can have lower GHG emissions than BEVs in Brazil, and traditional ICEVs using biomethane also outperform BEVs in some scenarios [5].
CO2 Emissions of Battery Electric Vehicles and Hydrogen Fuel Cell Vehicles
BEVs have lower CO2 emissions than conventional vehicles, while FCEV emissions depend on hydrogen production method; BEVs are cleaner than FCEVs if hydrogen is from pollutant sources [6].
Real Driving Range in Electric Vehicles: Influence on Fuel Consumption and Carbon Emissions
Real driving range and carbon savings from EVs depend on driving style (aggressive, normal, moderate) and route type, with urban routes being the most common and polluted [7].