Car coloring, painting game
Car coloring, painting game. Around the world, there are about 900 million cars on the road these days. Most automobiles in use today however are propelled by a internal combustion engine, fueled by gasoline or diesel. Both fuels are known to cause air pollution and are also blamed for contributing to global warming. While road traffic injuries represent the leading cause in worldwide injury-related deaths, their popularity undermines this statistic. The car is one of the most recognizeable inventions of the modern era. Fully autonomous vehicles, or driverless cars, already exist in prototype, and are expected to be commercially available around 2020. Established alternatives for some aspects of cars use include buses, trains, subways, tramways; walking, cycling, skateboarding, using a velomobile.