Large cities tend to heat up more during the day than they can cool off at night. This leads to increased temperatures, particularly during summer months. Those high temperatures mean more energy is consumed to run air conditioning equipment, which costs building owners and residents money. They also have a negative impact on the health of humans living in cities. According to a report published in Nature earlier this year and referenced in an article by CleanTechnica, mass adoption of electric vehicles in Beijing, China would lower the city’s average temperature by 1 degree Celsius. Because electric vehicles are more efficient than cars with internal combustion engines, they generate only about 20% as much heat while in operation as fossil fueled cars do.