Although electric vehicles have zero tailpipe emissions, they do still produce some pollution from tyre and brake particles. But the main environmental impact comes from EV production.
A European Environment Agency report highlights that emissions from battery electric vehicle production are generally higher than for petrol of diesel equivalents, largely due to the battery manufacturing process.
Most batteries are produced in China, Japan and South Korea where the carbon intensity of electricity is still relatively high - although a sharp increase in the proportion of renewable electricity available in these areas, particularly China, is predicted between now and 2025.
Lithium EV batteries are also largely made up of metals such as copper, aluminium and iron which, along with other essential raw materials, require large amounts of energy to extract.
As EV production methods and battery technologies advance and the carbon intensity of worldwide electricity decreases, total emissions from the manufacture of EVs will fall.
And when you look at the emissions produced across the lifetime of a vehicle, including production, UK government research shows EVs are around 60% cleaner than diesel cars and 66% better for the environment than petrol equivalents. These figures will continue to improve with time.