Mechanical energy is the area of transportation which involves as little human energy as possible. Cars, trains, buses, and other forms of transport which rely on mechanics are all examples of mechanical energy. In theory, this area of transport is ideal, because it is time effective and greatly reduces the amount of human effort necessary to travel. However, Americas transportation infrastructure has developed to rely solely on burning fossil fuels for energy, making mechanical energy a toxic entity. In the following pages: Clean Fuels, Public Transportation, and Car Pooling (seen below), there are ideas on how to make your daily commute earth friendly and cost effective. Do your part, travel smart!