Electric cars are a promising way to reduce pollution from vehicles, but they face challenges due to their lower energy storage capacity compared to traditional cars. Scientists are trying to improve electric car technology by researching sodium-sulfur cells, iron-air batteries, and lead-acid cells. They are also exploring hybrid cars that use both an electric motor and a gasoline engine, but these hybrids are most efficient in city driving. Various electric car projects are being developed globally to tackle these challenges.