Cars are most common worldwide, available in various sizes and powered by different fuels. Motorcycles offer speed and agility, available in different styles. Bicycles are human-powered, used for short distances and recreation. Trucks transport goods, buses serve public transportation needs
Air horn creates loud noise using compressed air through reed or diaphragm. Horn's flaring metal or plastic bell amplifies sound energy. Horn length determines pitch, longer horns produce lower notes
Biodiesel was first produced in 1853 by Patrick and Duffy through vegetable oil transesterification. Modern biodiesel production emerged in 1930s through transesterification of vegetable oils. Biodiesel is made from fats and contains long-chain fatty acid esters
Cars produce over several billion tons of pollution annually in the US. Vehicles account for almost one-third of smog-forming emissions. Average commute time in the US is about 30 minutes
123 and ABC road mats help develop literacy skills. Free printable transportation lacing cards improve fine motor skills. Transportation memory games teach letter and number recognition. Transportation songs enhance circle time learning
Calculator estimates emissions from home energy, transportation and waste. Results vary based on location, habits and personal choices. Users can download calculator as Excel spreadsheet