For "Sustainable development" department EN, For

Conventional cars emit an average of 17 kg CO2 / 100 km

Electric cars consume at least twice as little primary energy as compared to a similar car with an internal combustion engine. 4 to 5 times less energy (13-20 kW for electric vehicle category M1 vs. 50-80 kWh for a vehicle with an internal combustion engine due to consumption and energy content of the fuel) is spent on the move itself.

Electric cars do not have exhaust emissions in use. Due to their better energy efficiency, carbon dioxide emissions (related to the generation of their required electricity) are much lower per unit distance, even with the current energy mix in Bulgaria. When using renewable energy, the difference increases even more. At an average mileage of 20000 km per year, carbon dioxide emissions for electric vehicles would be at least 615kg less, and emissions of fine particles - at least 2.8kg less than an ICE car.

Data from the  Executive Environment Agency show that in the day without cars (September 22, 2016) the air in Sofia was almost 3 times cleaner than in the previous days. The initiative was proposed to Sofia Municipality by  Sofia Initiative - Green Capital Initiative

thus Sofia joins a number of European capitals, which on this date limit the movement of cars in the city center. The fine particulate level was 2.56 times lower than the previous day and the nitrogen dioxide was 1.35 times. This once again supports the idea that the alternative to conventional cars is more than necessary.

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