A new analysis published in Environmental Research Letters reveals that battery electric vehicles (EVs) in the United States have a smaller carbon footprint and lower overall costs compared to gasoline-powered vehicles. Factors such as local electricity grid greenness, climate, and driving habits play a significant role in the emissions savings from EVs. Despite higher upfront costs, EVs offer lower fuel and maintenance expenses, making them cost-competitive with gasoline vehicles even without tax credits. The study provides tools for policymakers and individuals to assess the benefits of EVs based on their specific circumstances, showing that EVs can reduce emissions by 40-60% compared to gasoline cars in most parts of the country, with the greenness of the local grid being a key determinant.