Transportation is one of the most critical sectors in the fight against climate change, responsible for approximately a quarter of global energy-related carbon dioxide (CO₂) emissions. i Of this total, road transportation contributes 74.5% of emissions, with passenger cars being one of the main sources. ii In Latin America, transportation accounts for 35% of CO₂ emissions related to energy consumption, positioning it as the largest emitter in the region. iii

In this context, electric vehicles (EVs) have emerged as a possible solution, driving a significant shift towards a more sustainable mobility. In the last decade, global EV sales have grown by 50% annually, reaching more than 10 million units sold by 2022. iv However, the question remains: Are EVs really the ultimate solution to mitigate the environmental impact of transportation?

This article examines the life cycle of EVs, from battery manufacturing to disposal, and compares them to internal combustion vehicles. In addition, we explore how public policy, battery recycling and charging infrastructure can maximize their positive impact, highlighting international examples and lessons specific to Latin America.

The environmental impact of batteries: production, challenges and recycling

The increasing adoption of electric vehicles (EVs) as a sustainable alternative in transportation has put lithium-ion batteries in the spotlight. While they are essential for reducing emissions over the lifetime of EVs, their production and disposal present significant environmental and social challenges that must be addressed to maximize their sustainability.

The manufacture of lithium-ion batteries generates a significant proportion of the total emissions associated with an electric vehicle. According to the Yale Climate Connections report, the production of an average-sized electric vehicle can generate 50% to 60% more CO₂ emissions than a comparable internal combustion automobile due to the impact of mining and processing materials such as lithium, cobalt, and nickel. v

Figure 1: Comparison of emissions in vehicle production. Impact of critical material extraction

• Energy consumption and natural resources: Lithium extraction, mainly from salt flats, requires large amounts of water, which can cause water stress in arid regions. Cobalt and nickel, mined in countries such as the Democratic Republic of Congo, are associated with ethical concerns such as child labor and poor working conditions.
• Environmental impact: In addition to direct emissions, the mining of these materials generates toxic waste that can contaminate soil and water.

Although EVs concentrate most of their emissions in the manufacturing stage, the lifetime of internal combustion engine (ICE) vehicles, characterized by continuous emissions of CO₂, NOx and particulate matter, results in a more negative balance in the long term. According to the Global EV Outlook 2024, even in countries with an energy matrix dominated by fossil fuels, EVs generate less total emissions over their life cycle. vi

Recycling lithium-ion batteries offers a key way to mitigate the environmental impacts associated with their life cycle. However, this process faces several technical and economic limitations:

1. 1. Recovery rates: Currently, the most commonly used methods, such as pyrometallurgy and hydrometallurgy, recover between 50% and 70% of the materials, including cobalt and nickel. However, lithium is often lost or requires additional processes for recovery.
   2. Circular economy: Despite limitations, battery recycling can reduce up to 30% of the carbon footprint associated with the manufacture of new batteries, according to PV Magazine. vii Countries such as Norway have implemented effective policies to ensure recycling rates above 70%, and initiatives such as BeePlanet Factory in Spain stand out for their capacity to process up to 10,000 tons of used batteries annually. viii
   3. Technological innovations: Companies such as Redwood Materials in the United States are developing advanced methods that promise to recover more than 90% of battery materials. This approach not only decreases dependence on mining, but also promotes regional self-sufficiency. ix

In summary, although battery recycling faces technical and economic challenges, it represents an essential component in reducing the environmental impact of electric vehicles. Current initiatives, from traditional methods to technological innovations, are leading the way to a more sustainable future, demonstrating that the integration of advanced solutions and the circular economy can mitigate the negative effects of battery production and encourage a more responsible use of natural resources.

Emission Reduction and Electric Power Usage in Electric Vehicles